I'm thinking of buying a new set of speakers for my laptop/computer. I currently have a set of Sony speakers and a Sub which came with it. I bought them reduced in Tesco for £15 (I think), the sound quality is ok, but the bass over-powers the sound and the sub sometimes rattles, resulting in poor quality!

Anyone got these or heard them? Where's the cheapest place to get them? I'm hoping they should be a good improvement to what I have just now.