You guys! Now you're making me feel uncomfortable sharing my experience! But here it is anyways...
I've had a vv twist that made me try a provari. I ended up having 4 provaris at one point with a total of about 8 or 9, with the others selling for accessories(tanks and such) and given to friends. The provari is very high quality and well built. The limitation is on the tank. I used to be tied to my protanks with stock coil but was never happy. It wasn't the provari's fault, it was the tank. Modified my protank bases, recoiled my own heads, wicked with cotton and it was night and day. I was happy! Then the battle was convenience. Re-filling juice, carrying a backup coil, and worst was cleaning and recoiling/rewicking the coils. It seems like I was never contented.
Then I tried a reo grand. With help of super_x, jifjif, mundy, jc, redeye and a lot more people, I am content so far with what I have. But never thought I'd get it from a mechanical. Right now I am eyeing a vv reo to try-I know this sounds like I am still looking after saying I found contentment, but it is just to look for something better that I MIGHT be missing out on. What I focus on is the fact that I "switched". From provari/tanks to reo grand. If I ended up liking the VV reo, I'd have it talk crap to my grand! LOL!