The higher up the chain you go the more backward compatiblity they have built in. The N routers work with B & G. The only one to avoid are the A's, they are usually in business environments. It is not that complicated. You can also buy wireless access points and media streamers to connect up to your receiver. There is also a seperate gaming access point for the Xbox.

Linksys access points


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70