Another option is to get a bluetooth mini hifi so you can cut down on wires and keep a headphone socket on the computer. I got an own brand 'Sandstrom' one from Currys and it's great - can't complain at all.
This is also useful as you can tell system notifications like email sounds and so on to play from the computer speaker and not through the hifi, so you don't get super loud text alerts at 3am, which can make you jump let me tell you!