I'm using a KGO (from Annette) and a newly acquired Ego-Twist (which I hope we can talk Annette into carrying!). It's a 1000 mah variable volt, you just twist the endcap a little to get to your desired voltage.
I was using the Visions for a short time but I just don't care for them personally. So, I use plain old boge 510 cartos, sometimes LR, sometimes SR (prefer standard resistance).
Oh Ms. Anneeeeeettte! Once the dust has settled, I hope you will consider carrying the eGo Twist! It's an easy-to-use, solid, very reasonably priced 510 VV device for those of us who could/would never fork out the big bucks for one of the "high-end" VVs available. (We'd rather spend our money on Virgin Vapor juice!)