I have been vaping mech mods w/ RBA/RDAs until recently. My most current vv/vw mods are the eGrip and the IPV mini 2.
I loved the egrip for it's form factor, but it broke on me a few weeks outside of their 90 day warranty. USB connector broke.
As far as the IPV mini 2 (70W), i really like it. It feels solid, and since I used mostly mechanical mods, I have plenty of 18650 batteries that I can swap into the IPV mini 2. You can USB charge it if you choose to.
I was on the fence with the eLeaf iStick 50W. The thing that turned me off the iStick is the part that actually broke on my eGrip... The micro USB connector. This is the piece that broke on my egrip and rendered it useless. Since that's the only way to charge the iStick, I didn't want to risk a repeat.
When I was shopping, I found online deals for both the iStick and the IPV mini 2.
iStick ~ $30-$40
IPV mini 2 ~ $50 - $60
For the tanks, I have been using the Aspire Atlantis, and just recently ordered the Kanger Sub Tank mini. Both are around $30-$40
My 1st mod was the original iTaste MVP when it first came out. It charges with micro usb only. It's still works flawlessly, so maybe my egrip was a fluke occurrence with the center post of the micro usb becoming unsoldered.