50 inch + ps3?

I want a good home entertainment devise that have good hard-disk space and will load picture, sound and video in its hard-disk.

I was thinking of a Playstation 3 witch got a 60 gb HD and blueRay player, and got games. But cud this read from my external HD ? would this device also view my photos and itunes music if I movie it into PS3 HD? would i be able to watch my music videos witch are not only from itunes but generally collection of music videos?

Does the Xbox 360 do it better? what should I get? what do you recommend? Im also thinking of an 50 inch plasma but i already know witch one. But The ps3 will have to wait, I just want to make sure to choose right before i jump and buy. I know sony does always a good job but is this worth it?

Thank you for your time <3