Xbox does not support full 1080p and it's interface for anything but games is 2nd class, so if you really want the best, you must pay for the best.
PS3, a Macmini with a HD tuner, four Magnaplaners, 3000 Watt Pure Power Amp, a couple Subs and a 73" 1080p Flat.
You got game - PS3
you got music - iTunes
you got movies (puchased) - iTunes
you got movies (rentals) - Windows Media (via Parallels)
you got internet - OSX (no viruses)
you got intertainment (your computers library - adult or otherwise) - OSX
you got upgradability for 10+ years - external - BlueRay, Terabites, etc. etc. etc.
YOU GOT IT ALL