http://www.linksysbycisco.com/US/en/products/WRT310N
I've heard the 320N is a good step up, but this one is quite good.
Wireless routing only sucks for gaming if A) you don't forward your gaming and torrent ports for
all PCs, B) if no one is running dick-move programs like uTorrent instead of Azueus or Bitcomet, and C) you block your wireless access using something like WEP or the like...I myself recommend just using MAC filtering, as it's easier to set up, needs no passwords, and it's pretty damn unlikely someone will figure out what MAC address to spoof.