Audion is also very good (www.panic.com) for Mac's. It's shareware after a trial period, but actually worth the cost. One of the few shareware programs I have coughed up the dough for. I haven't checked out the new Mac version of WinAmp yet, but it's definitely better than any other Mac mp3 player I've seen (MACAST, GreyAmp, RealJukebox, etc).