MP3 Tagging / Organising Software?

Hey guys,

Not sure where the best forum to post this is, so mods, please feel free to move as appropriate.

I want to tackle my unwieldy MP3 collection and I'm at a loss as to where to start.

I used to do it manually, however it's very time consuming and I was wondering if any of you guys in the know could perhaps recommend a software package for cataloging and organising a large MP3 collection?

Something to display all the correct tags in a unified format with Artists name, Album name, Track, track number, year etc..

Something that perhaps gets all the tagging, album covers straight off the net?

Would really appreciate any recommendations or suggestions as I've never used any such software before.

Thanks!