pesonally, if you are looking at getting a new router, I would try to get one that will allow you to use some of the open source firmware, like DD-WT or tomato software. these are very good at allowing one to setup QOS for the router outbound and inbound traffic, which is very good and necessary doing things like prioritizing VOIP streaming, media streaming from the LAN to the WAN, etc.

Linksys and netgear made routers that allow this. as does buffalo, but I think the first two are better.

Most of these are only G and B rated, you could try and find an N rated one, but personally I don't find an deficiency using G rated routers on the LAN still. Most of my large file transfers are done over a GIGE ethernet link.