I think Farlow might be able to do something suitable. I've only received quick sketches from him though so I don't know how he is when it comes to working through the stages from start to finish. It's alot of effects there though, there's risk that the artist would end up with a rather busy looking piece.
The other thing to keep in mind though is that every collector has tastes and standards. Those who check on my collection regularly and who have been included in some of the commissions I've gotten would attest that I'm rather selective and nitpicky about artists I work with. So what may not work for me might work for you.
I'll definitely keep him in mind for when it comes time to actually DO this.
Thanks all. 
Be sure to post whatever you end up getting!
Don't worry about it Wassy. I've been responsible for a lot of threadjacks. At least this one was productive, unlike mine, which usually end up being:
/em Robot Chicken Nerd
Booobs...
As for what I meant by "action", well, it was going to consist of one character in the middle of a Total Focus pose, while the other is doing the pose for Power Blast, and both would be in the air. Power effects would consist of Snow Storm, the glowy fists of TF, and the glowing for PB (possibly with one or two of the balls of energy in the air).