I too have Aerius i's for my front speakers. I also use a Cinema center and Stylos rears, with a REL Storm sub. This has made a nicely-integrated HT.
BUT - I refuse to give up quality 2-channel performance. I chose an Anthem AVM-20, and recently had it upgraded with the 2.08 upgrade (Pro-logic II, DTS:Neo, THX Ultra2, etc.). With its 'Analog Direct' mode, you get complete 2-channel pass-through -- no signal processing - not even tone controls will be in the circuit. Because the REL can connect to the speaker-level outputs on my 2-channel amp as well as to the LFE output on the pre/pro, the sub can be used during pure stereo operation.
The '20 has balanced XLR & non-balanced RCA inputs and outputs for everything, is very quiet and has a broadcast-quality 1080i/1080p-capable video switcher that works really well. I am also amazed by it's flexibility of setup.
The one negative I can say about Sonic Frontiers/Anthem (a Canadian co.) is their warranty policy - NO transferability for the otherwise 5-year warranty except when brokered by an authorized dealer. That caused me to forgo the buy-it-used route, because this thing is truely a complicated computer, with daughter cards, firmware and an operating system. They are now owned by Paradigm (also Canadian), who really hates Internet resales of their equipment. In this area, Bryston (again - Canadian) kicks everybody's butt with a fully Transferable 20-year warranty.
Hope that helps,