Forgive me for being a newbie to the world of dvd players. I'm thinking of ditching my trusty PS2 as a DVD player, let's face it, it's crap and always was! I'm thinking about buying a Pioneer DV454 but i'm a little confused as to what equipment i need to get Dolby Digital 5.1 and DTS. Do i need an extra receiver or will a decoder built in to a home theatre speaker system work? I'm really confused.. please help.