i just have a lead running from the back of the pc to my sony hifi (a jack lead, with the red and white on the other end), lead cost me £5 now i have two 400 watt speakers (subs and surround sound also) of hifi quality music on my pc!!

i just have to remember to turn off the hifi before colsing down pc, cos the windows logging of sound can make you shit your self if youve just been listening to something loud on pc!