I am thinking of buying a Surround sound system for christmas, i have a PS3, Xbox 360, Nintendo Wii, Sky HD Box (May soon switch to a non HD Virgin box) and a DVD player (May be switching to a standard sony blu-ray player soon)

I have a Samsung TV 40'' Series 5, all of the above and i would like to fit it all (or as much as possible) to a surround sound system, What kind of system would i need to buy to have it all connected?

I hope i have given enough information for someone to help! Thanks.