I've got an extra WRT330N laying around if you're interested! It was designed as a gaming router and has all the features you could ever want / need - 4Gb ports, Extensive QoS settings, Security, Port Forwarding / Triggering, Usage monitoring, etc etc and excellent coverage!
It ran for a good 6 months or so and never had to be restarted or had any issues - with 5 wired computers connected to a file server (all GbE), 4 wireless devices, 2 BD Players, and 2 Xbox 360's. It's the older style WRT300 / 330 / 350 / 600 style with 2 rubber duck antennas and a patch in the center.
It isn't dual-band, but it does support wide-band and automatic network adjustments based on tested WAN throughput and RF behavior.
Either way, this series of routers was my favorite - even to this day. Although they weren't dual band (except the 600N) they were the most reliable routers made IMO. I'm not a fan of the new fancy looking compact units, they just aren't as reliable and don't perform as well IMO.
Check 'em out on Amazon or Ebay if you can still find 'em, otherwise the WRT54G/GS/GT and SRX models were pretty reliable also if you only need .11g!
If you're interested, let me know and I could probably work out a good price. I have a Paypal Premier / Business account also so you'd be insured 100%.
**I'm not sure if this is against forum policy or not and apologize if it is. If I'm in violation please disregard / delete the part about it being for sale...