Don't miss the $300 sale of the RW-12D on newegg. I have a SR5007 currently and I'm enjoying it. It has full 7.2 preouts in case you get the bug to upgrade to an amp. My coworker was looking at the SC-61 but discovered the SC-1222K is nearly identical for a lot less, also for sale on newegg. Those both also have 7.2 pre-outs and use Pioneer's MCACC instead of Audessy. For rears, I've been using old yamaha bookshelfs to run with my klipsch front if that's any indication of how important rears are. I'll be getting klipsch rears someday but they were low on my list of to buy items. Good luck with your setup, it'll be great.
Marantz SR-5007 Klipsch WF-35, RP-450C, WB-14 theater
Marantz 2325 Klipsch Forte ii stereo
Sony PS3, Xbox 360, Wii U