Really depends on what you want from it, and what sources will be used.If it's just to improve sound form your dtv then you cou;ld connect to hifi or use a soundbar.for a full 5.1 then an all in one box or seperates is the way to go.A little more info on what you want to acheive will help, and a list of other equipment being used ie Sky, blu-ray player, games consoles etc.