Yep, the tox (based on tech specs) really answers the battery life or size question, since you have both options. Sounds like you came to the same conclusion I did, after both of us did our research. And seriously... I'm not a very tech spec-ie kind of a girl, but that PBusardo review really connected some dots for me. And as for the Tox, the improved size options and screen... plus the fact that it revs up from 0v - requested volts very quickly, rather than instantaneously like Lava Tube, is sure why I ordered one over lava tube. As for the Tox problems, I can pretty much say for certain just from following all the tox threads closely and chatting with vendors that this is a limited time problem, affecting only SOME of the units, not all. Had I not ordered already, I probably wouldn't at this very second, just till they're sure all the bad ones have been weeded out of the bunch, but I'll bet in a few weeks or a month when they get the voltage programming issues resolved and the corrected heads are available, its gonna be a pretty useful and multi purpose mod for the price. So if you have the ability to wait... I don't think you'll do better in a VV tube mod for the money. Esp if you back it up with a longer term warranty, just to protect yourself.
Now the rest of stuff might be old hat for you, since you've been hunting for best vv for yourself as well, but here's what I figured out, in general about vv options. If anyone else has an option I HAVEN'T thought of, I'd love to know, since my options are still a little up in the air.
The thing about VV is it just got a lot more complicated. Even a few mos ago, if you wanted VV and you didn't want to spend in the $130-$230 price range, you pretty much had one option. An inexpensive VV box mod. Now, if you don't want a box as your permanent vv mod for some reason (my hands are just too small... its really an odd fit for me), the only two vv tube mod options, under say the $130 price point, including batteries and charger, are the Lava Tube by any name, and the new GS-SUB / Vision Tox / Howitzer.
However, if you're really broke or don't mind a box, there are some AMAZINGLY versatile and remarkably low priced vv box mods out there. They're little boxy powerhouses, really. They don't look shabby, and my friend Rickajho has been doing mad research on all the vv box mod options, so if you're willing to consider that, great options are out there. I could be wrong, but I think the one he settled was called a Vari-Cool after serious research and comparison shopping, with a price range in the mid $50s. Another thing to consider, esp if you vape with a lot of low resistance attys/cartos, or use a lot of dc cartos, is that (to my knowledge.. I'm by no means an authority) most of the box mods don't have such a low amperage restriction like the Lava Tube and Tox. If I want to vape a 1.7ohm carto at 6v, my box gives me an actual 6v in other words, right up until I fry my carto/atty. Plus, if you're the slightest bit handy, you can buy the bits and build one yourself for under about $30, I believe. There's some premade ones that aren't much pricier than that, as well.
If you have just a little more money to invest, both the Infinity Pro and the Buzz Pro are excellent vv mods. There have been some issues I've heard of with people having to send them in for repairs, but from my research, owner of both are very happy, and they definitely have a gorgeous 'high end' look about them. I think they're much nicer looking than any of the cheaper options, lets say that.
Now for me, were I not financially challenged, lol, I'd buy a Provari in 2 seconds. Not only is it a pretty darn well un-paralled device, but I just found out they have a $20 upgrade program. So if you buy a Provari now, and want to upgrade to a higher model in the future, it costs a whopping $20 to do so. That's pretty amazing to me, and I can't believe more people don't talk about that feature. I'm not 100% certain on the details, but I got that info from a happy intelligent Provari owner, so guessing he knows what he's talking about. That means, you might spend an extra... um, say $80-100 now (w batts/charger/cap extender), but you'll have the best. And even better, its the last pricey mod you'll ever have to buy. Kinda cool. I'd certainly invest in one, had I the funds. And I've never once heard of a Provari owner who regretted the investment, which says a lot. Plus, with the cap extender option, I think its the only other VV that has the switchable battery size option, other than the less expensive (and less quality) Tox. I'm not 100% certain the others don't allow you to switch size, but I know both the Tox and the Provari do (though in different ways).
I think Darwin's are even cooler and more techie featured than Provari, actually, but I think Provari is a hyper simplified 1 button interface, whereas Darwin has a ridiculous number of things you can change and adjust. I don't know the details, but just reading the description is pretty snazzy (and more than a little complicated). They're even pricier, I believe, than Provari, now, though, aren't they?
Oh... just realized, I forgot a new option, which is a fixed voltage device with the new KICK internal controller.. I think that's how that works, but turns fixed into vv, if I read the description properly. That's brand new as well, though. Haven't seen a ton of reviews, yet. I know people have been looking forward to their release for months, now, so it might be a relatively inexpensive way to turn the fixed v mod you love into a vv option. Of course that's all assuming that I got the general gist of how the thing works. Its really cool... just a little internal switch that you stick in the battery tube, and i believe its got a little wheel that adjusts your voltage. I'm rather curious as to how well they're functioning, if anyone has any opinions on these. That's probably the thing I researched the least, just cause I'm seriously techie challenged, so anything involving messing around with the batteries is something I avoid.
Am I missing anything? Any I haven't thought of? I was all settled on the Tox, and loved it (and mine may well show up and be perfect and thrill me), but now I might be in buy mode again. Any other VVs out there?