Help needed...

I'm looking at buying either a PS3 or and XBox360, I understand that both have their points, but from a gamers point of view which is best?

I am mainly interested in driving games, but also have a daughter that like playing other stuff?

BluRay on the PS3, and WiFi is a big bonus too.

Plus, no subscription to net based games on the PS3 over the XboxLIVE...

HELP!!!

Also, what is the best driving/racing game for these consoles?