Robin, the subtank also comes with a 1.2-ohm coil (which can also be purchased) or you could make a 1+ ohm coil in with the rba section, so--theoretically--you could use it with the MVP2 or MVP20Watt. I suspect you are in a similar position as I--I would like to get higher level device than my MVPs and Vamo, but with the rush of new toys coming out, are not sure where to go. The list is quite long (I think they're keeping track of many of them on the APV forum). Front-runners for me include (but are not limited to) the iStick 50 Watt and MVP3, with consideration still being given to such possibilities as the Cloupor Mini and a few others....
Time for me to trundle off to bed after a little bit of TV. Good night, Treefam!