you want space saving or best SQ with big speakers?

For big full systems, I'd recommend these for great SQ without a big hole in the wallet

Receiver: Panasonic SA-XR55 - your original choice
Front: Mission M35i 3 way floorstanding (Amazon has them for 50% off)
Center: Polk Audio CSi5
Rear: Ascend Acoustics CBM-170
Rear back: Mission M32i or M31i if you can't find any M32i
Sub: Velodyne 12" or Dayton 12" from partsexpress.com

That setup would be great or B&W would be a nice choice as well