I'm currently using a 2 wire at the moment. It works great wirelessly. I can run up to four items wirelessly at once. as well as four items hardwired.
One day, just to stress test the thing I connected three Nintendo DS to it, one running Mario Kart DS, another running Pokemon Diamond, and the third running Phantom Hourglass. Then I connected my Wii running Smash Bros. Brawl. I hardwired my 360, PC, PS2, and original Xbox and had the following games running, GTA 4 (360), Socom (PS2), Halo 2 (xbox), and was playing Left 4 Dead on the PC. I didn't experience any hiccups at all with any of the games running. However sometimes the PC can be a network hog when streaming videos. I got my router/modem through AT&T DSL internet service.
I don't own a PS3, but I figured that might have helped in your decision to try a 2wire. Just be warned sometimes the network will crash and you have to either unplug or turn off the router and get it back on so that you can connect.