I have both a PS3 and a 360. My 360 got the 3 red lights of death though. I need to call Microsuck to get a coffin and get it fixed. Personally I like the PS3 better. I never hear any noise out of it. The Blu-Ray alone makes it worth it IMO.
Right now the games are better for the 360 though. In the long run I think the PS3 will have the better gaming library. Even by Christmas or early next year I think the PS3 will have the better games.
I look at it this way. If I am thinking of buying a console for long term, I will look at the hardware itself and the lineup of games that are planned to come out for it. In this I think the PS3 has the edge. If I were looking for immediate fun, then I would pick up the 360.
If it is an option for you, get both!