Does a MD hold more MP3's than a 30 gig iPod. Fuck no. I think you can get about 5 hours of music on a MD, but that's nothing compared to 30 gigs of storage. Plus, iPods look great too.
iPod > anything on the market.
Although it's expensive.
If an iPod isn't in your price range then what you're looking at isn't a bad choice. I just don't see the point of MD players.