Again the
CAL!s are probably the best suggestion here (by that I mean, they'd be the ones I'd pick in your position lol). Their one big downer is their portability, as they don't have particularly good isolation. If that's not a problem, then I highly recommend them. In the price range, you'll struggle to find headphones with the depth of clarity in bass, mids and treble as the CAL!s, they are really laid back, with a nice rich warmth from the bass transitioning well into the mids. If you read Tyll's review, he said they compete with headphones 5 times the price and he's not kidding. They may not be as good as say, Philips Fidelio L1s, but they are 80-85% of the headphone for 25% of the price. They will sound great with whatever you're listening to. Added bonus, they don't need an amp (though even the cheapest of amps can always provide a difference on headphones, for these it's not essential).
Another suggestion for you to look into;
Koss Pro DJ100. These are cheaper than the CAL!s but they
do require an amp, more so than most cans in this price range. That said, with an amp they are terrific headphones for the money. Not as bassy as the CAL!s but not lacking in bass either, it's less warm/rumbly but more detailed and well-balanced. Upper-mids have a slightly forward tilt, so these sound good with vocals too.