New iMacs with Lion......?

I think I know the answer to this but maybe someone here has used a work around in the past. Ive been waiting for a new mac pro forever. I Think im going to settle on a new imac and thunderbolt display when they get released later next month (hopefully). I really wanted a 6 core but at least with usb3 and thunderbolt my storage problems will be solved. No way I can wait till 2013.

My problem is it will be used in a studio running Pro Tools. I know Avid is notoriously slow with supporting new OS' (im currently stuck on Snow Leopard with PT8) I was going to update to PT10 for the new computer but I know mountain lion wont be supported out of the gate. do you think there will be a way to roll back a brand new machine to Lion even tho it shipped with mountain lion? The MBPs shipped with lion so im hoping that may help in some way. I'm running a self built hackintosh right now so I have zero problem hacking it to get it to work if I have too but I was hoping for some sort of easy supported way.....