i definitely have to disagree with this. yes, logitech does make some good speakers (i own the z-5500) but they're generally pretty poor when it comes to music.
the best speakers i know of around that price are the klipsch promedia 2.1. they don't have the thundering, LFE quality that speakers specifically geared toward movies/gaming have, but the bass is very deep, tightly controlled, and LOUD (i wouldn't recommend turning the bass higher than the factory default, it's that loud). also, their mid-range is crystal clear and balanced extremely well with the bass and high-range. all that makes for, in my opinion, the best speakers for music (any genre) in its price range.
i live in the US, so i'm not sure if there would be any price markup (klipsch being a US based company), but here they cost $150 for the wired version, roughly £93 according to google. the wireless version is an extra $50, but they don't sound any better.