Anyone know any good cheap systems that can hook up to and ipod?

I'm talking surround in a small bedroom.
Logitech X-540
Guitar rig
Schecter C-1 Classic
Boss GT-8
Mesa 50/50 Power Amp
Avatar G212H 2x12 Cab

Synth Rig
M-Audio Oxygen 61
Creative Sound Blaster X-Fi Elite Pro
Reason 4.0
FL Studio 8
Logitech do a good 5.1 sound system, meant for computers but obviously will work fine with any mp3 player. I have the 2.1 that they do and I really like it; it sounds really good and the woofer is quite powerful. I imagine the 5.1 would be really good if the 2.1 is anything to go by.