I've had very good experiences with Belkin's Pre-N router (grey version--not the newest one), specifically with streaming video wirelessly; I can stream half-res HD plus AC3 audio with no playback hitches to an Airport Extreme equipped Mac. Belkin also makes Pre-N USB adapters which I would expect to work well with their Pre-N routers.
I'm very happy with my Pre-N setup overall, and figure it's worth investing in especially since it's backwards compatible with 802.11g and 802.11b.