Probably the Buzzpro since it doesn't have a screen less to break..but potentiometers (voltage adjustment in a Buzzpro) wear faster than switches usually..I would suggest getting a lanyard of some kind so you can hang it from your neck though so you can't drop whatever you buy.
Another option might be buying a couple chrome Lavatubes then if you dropped one you would have a backup..but I would wait until they come out with version 2 in a month or so if you went that way.
Another option would be the VV eGo's they sell to take out with you but they only have 3 voltage options 3.3,3.7 and 4.2v.
One thing you should be careful of if you drop e cigs lithium batteries don't like it..so be careful with any e cig you have dropped hard..watch it charging and for it to get hot..if it started charging fast and not lasting long that can be one sign of a damaged battery.
I looked into Lavatubes and video reviews made them seem... cheap. I guess its just a matter of getting what you pay for. I want something that is proven to work for an extended amount of time.
I purchased 2 VV egos a while back and both of them broke, within two weeks. The first I dropped and it never fired again. The second one 'charges', when I plug it in the light blinks a few times. When I take it off of the charger it wont fire. I have tried LR, standard, and Mega attys on it. None of them work. I definitely do not suggest ever purchasing VV egos.
I am currently using a standard ego and love the durabilty of them. Cheap, work forever, great throw away PV. I seem to always go back to them.
The thing is that the pictures of a GTUS on an ego.... well... it just looks FUNKY. Plus, I love VV (i had a madvapes vv box that worked great, until it fired/melted in my sweater pocket.... oops...).
The GTUS looks amazing on a provari, and I have been drooling over Provari's and Darwin's since I started vaping almost a year ago. Also, this video convinced me:
So I am taking the plunge.
Tonight I am ordering a mini Provari.