Ciara. see here: Logitech Z523 Speakers - Black: Amazon.co.uk: Computers & Accessories
I have these speakers and I think they are very good value for money. I have a room which is 14 feet square and they can fill it with sound. I've never turned them up full.
Obviously, they would not please a real audio buff but from my point of view they offer good bass response and a well defined top and middle range.
Zepher is right to suggest headphones. If you spent the same amount on headphones you would get a very good sound indeed. However, there is the drawback that you would be wearing headphones
for long periods of time.
I would suggest that if you decide to go with headphones you read the reviews carefully and consider the weight of the phones, what people say about the comfort etc. Full over ear headphones can be heavy and uncomfortable to wear for long periods. They can get rather sweaty as well.
Also listening on headphones is not a shared experience.
If you're thinking of music and movies and you have friends I would suggest going with the speakers. Headphones are great for gaming as they give a very immersive experience.
If you pay a lot of money for phones you get better hi fi but it is a different experience altogether.
Hope this helps, John