Can anyone recommend a good soundcard please ?

I'm looking to upgrade from onboard sound and need some good soundcard recommends, i have a budget of about £20/£30 maybe abit more if it's worth it. The card i'm looking 4 must have an optical in/out with a connection 4 the front pc case audio jacks and at least have 5.1 sound 7.1 would be nice but not a must have.I listen to alot of music and also record and edit my own stuff sometimes but i need a card thats not a resouce hog when im doing normal tasks.
Dont really know what i'm looking 4 when it comes 2 pc hardware so any suggestions would be much appreciated, thanx.

While it's over your price range, I just ordered the Asus Xonar DX the other day for less than $90 shipped to my home. I have heard nothing but good reviews for that card. Here's some user reviews from newegg: Asus Xonar DX. It has 7.1, HD audio front panel connectors, the sound from what I've read is really good, and it also brings a Toslink adapter so you can connect the optical.

I should be getting it on Monday, so I'm excited :D