I've been using the Buffalo HighPower N600 Gigabit Dual Band with DD-WRT, but with 802.11ac on the horizon you'll want to assess whether you want to buy an 802.11n device or a draft 802.11ac device.
Two thing to watch out for when you buy consumer grade 802.11n routers:
- what frequency bands they support (stay away from anything that's 2.4GHz-only; you want dual-band 2.4GHz + 5GHz)
- the speed of the wired switching framework (should be Gigabit ethernet; if your router only switches at 100 mbps then you won't get the full performance out of the wireless network)