How big is the new room compared to the current room ? Unless the new room is deeper *and* significantly larger in volume I guess my first thought would be to stay with what you have.

Then again I imagine there's a few db of loss going through the acoustical screen, so if you're playing near the volume limits of the current speakers it might be worth going to M60s in order to get some extra headroom.

In other words, I don't know either \:\)

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8