The best value for the money you can find as far as I know is the Koss KSC75. Don't be fooled by it's looks and price. These headphones perform better than most other phones up to $100. I compared them directly with some Sennheisers costing a couple of times more and were better in the midrange, bass and highs. Don't remember which Sennheisers though. The bass is strong, deep and not booming. Mids are clear and detailed and highs are excellent too. I know what I'm talking about, I own HD600's and know what good sound sounds like. The Koss's are amazing for the price (only $19.99).

At least give them a trie. It won't break your bank account.