i have a xbox and now i want a surround 5.1 set, the problem is im not sure which one that can be hooked up to my xbox and wich ones that can not...i dont even know if i need a sound reciver!! but i do know i need the high def pack and a optical wire.... so what woud be a good set to invest my money in?(and is the creative inspire gd580 any good?.... the price shod be around 150-250 us dollars...) please reply..thank you