While I am a huge fan of the Reo, have several, and consider them my favorites - there's not a real substantial difference - a basically mechanical 1-battery squonker is only going to give you what the battery/coil can give you.
There are some regulated bottom feeders if you want to go that route, but not a LOT of them...
I have a Wraith, which is a cheap way to try it: $60, 80 watts.
It's VERY heavy and solid, and I think it looks cool. I think the bottom "door" to access both juice and battery is overstressed and may fail..but it hasn't yet.
Or if you go 2 batteries, there's a 160 watt Dripbox...and there are a lot of better ones, including DNA200 mods - especially if you have a bigger budget...
0.5ohm is better but I'd like to go a bit warmer so I think I'll try a 0.35ohm in 25gauge.
VW has its advantages,so I'm wondering what company is going to make a good VW one cell squonk mod.
Does the Reo grand hit harder ?