PS3 hands down. Since I got a flatscreen its the only device. games are awesome, system is bacwards compatible all the way to ps1 so in my case I never lost a game on the upgrade, plus full web access, in other words, if you have a sat like DirecTv with a DVR, you can stream the saved programs right into your burner using the 3 as an interface.
Plus its a very good blu ray player