I'll be going with a VV Grand. Rob is set to produce up to 1000 of them. First batch coming out 9/9, another couple hundred due a few weeks later.
VV Grand has the notcigs VV controller (well tested, consistent, output -- it's used in the Notcigs Buzz and Infinity Pro, their VVPV, and the VV Woodvil) coupled with REOS' tried-and-true Grand feeder. An excellent matchup
I've had notcigs original infinity, two buzz pros (second is just for backup, very good price point), and vvpv. VV Grand will have higher eliquid capacity and a bit better run time than VVPV between battery swaps, though the top-feed VVPV is top notch for flavor
I've tried a non-regulated feeder, a beautiful wooden RSM Mark 9. It's a gorgeous product, works well, excellent run time, but I've become very much spoiled by the consistency of a good VV (I use the RSM with big 18650 batteries, but there is still that taper in output).
I'd suggest looking at the VV Grand rather than a non-regulated REO plus a Kick, at least if you want runtime to match eliquid.
The reason a Kick was suggested, I expect, is that the base REO Grand or Woodvil, the non VV, is not regulated -- output power will vary over time, as the battery discharges. If you want even a little over 3.7V (other than first few puffs off an unregulated fully charged battery), a regulated unit is what you need. Likewise if you want the output to stay consistent, you need regulated. The notcigs-based products, the Provari, and PV with a Kick added all get you to a well regulated output.
You're looking at some good products, none of the choices are bad. If a tube PV with tank is a valid option (should be if you're considering Provari), you might want to also check the Buzz Pro. It runs about $125 total with two sets of batteries and charger, after taking the "ECF Buzzkill" discount, is a very good, durable, unit.