im looking at buying an integrated av receiver/amp for surround sound, now i only want the 5.1 (mainly for my xbox360) but most of the ones i look at are 6.1 or 7.1, the only 5.1 i could find in my budget (about £200) is the yamaha rx-v359 which i hear isnt all that great. But there is a denon i have my eye on. now my real question is, can I, and will it sound right to play 5.1 through a 6.1 or 7.1 receiver? Will it need to support dolby digital as opposed to dolby digital EX. X360 only outputs 5.1, thus that's all i need. thanks for helping a noob out.