I got whatever the current Linksys wireless B-router is, and it's the first Linksys product the I haven't liked. Mostly because I can't completely turn off the damn firewall and it was blocking torrents. I've had problems with that thing since I took it out of the box, I just don't trust it to save settings. I'll set everything up and have 2 PCs and my XBOX on it and then two days later one device will just stop connecting. The mileage may make with the varying but next time I buy a router I'ma make sure I can straight turn the firewall off.
I also use the Linksys Wireless Game Adapter for my XBOX, and this thing I love. If it had been onna shelves even a year ago then all my Halo friends would have one. Halo 2 might be convincing. Basically if you've got 16 guys, four XBOXs w\ Halo, and four WGAs then that's your whole network. They can talk to each other on specific channels or act like a wireless bridge for your PC. Very slick.
G is nice, but you don't need the speed for gaming. if you're going to have 2 PCs trading files to each other via wireless then you will want G, but if not you can prolly save some money by buying B.