PS3. Fat PS3 Suffers badly with fan noise, runs really hot too(could quite litrally heat a room!!!).
My FAT(launch model) packed in last week I went straight out and bought a slim(new version) OMG quite as a mouse and gets no were near the temp my FAT did.
PS3 doesnt look out of place in the livingroom with the rest of the AV gear, Xboxes are ugly as hell and belong in a kids bedroom IMO.
I would say the streaming from your pc is much good tho In my experience mines is always buffering(stop starting while playing).
Blu ray player and games, media all in one box also you can turn it into a sky+ box and record tv straight to the hard disk!
Oh and I just found this out, Sony done a software update which supposedly made all PS3's 3-D READY!!!
Awesome tool.