I'm currently using RTi4's as front with a CSi30 center... in wall for surround and rear.
Looking at buying RTi12's for fronts, moving RTi4's to rear, and finding a way to wire the in walls to act as just 2 channels for surround. I think I realize that the CSi30 is not up to stuff anymore with this setup, so I would also get a new CSi5.
Can anyone comment on how they think this would work out? I will definitely need to upgrade power for the RTi12's, but that can wait a while...