If you are going for online gaming, the 360 OWNS that category. There’s no debating that.
The only reasons to get a PS3 are web browsing and blu-ray player.
If you alrdy have a computer and a blu-ray player I see no reason in getting a PS3…
360 has way more games and more features and XBL is better than PSN…
Plus you’d be saving money by getting a 360.