I'm a huge fan of both Blind Guardian and Nightwish, and I'd just like to recommend BG's album "Nightfall in Middle-earth" for any metal fans out there, which is more less only inspired by the Silm, it's really excellent. And if you don't like metal you could download their song The lord of the Rings, which isn't especially heavy.
Nightwish aren't as obviously influenced by Tolkien as Blind Guardian, but they are, and besides, their music is great anyway (haha I've got concert tickets for July 24th, yeah!)