I'd lean towards the PS3 right now if I had to buy one of those 2 consoles. If you get the itch for the latest and greatest consoles at year end/ early next year, you can always dedicate the PS3 to blu ray player duties in another room. Graphically, they're very similar, and I am honestly comfortable with either controller.
I still enjoy gaming on my PS3. I also like the fact that online gaming is free, as I use it so rarely, I can't justify paying for it each year.