Being a mp3 player enthusiast, I am going to have to respectfully disagree with Sushubh -
Apple is not as great as most people think... Even after so many years they have been unable/unwilling to design an ipod with a user-replacable battery, which essentially means that if your ipod battery dies (which can happen in a year or two), you have to pay Apple about US $120 to change a $35 battery... or risk fooling around with soldering the battery in yourself.....
anyway, more to the topic at hand... mp3 phones are not a satisfactory solution if you want to have a lot of MP3s at hand and/or want to hear them for some time (i.e. more than 2-3 hours)... mp3 phones often don't have enough space, but if they do, their battery life goes down substantially to the point that playing mp3s really becomes a gimmick than a useful function.... so if you want to have your
music collection on the go, you are still better off investing in an ipod, or better yet, in other players like those from
Creative, which are cheaper, have more storage and user-replaceable batteries (though admittedly they are less stylish than ipods).
p.s.
Motorola RAZR has some surprisingly bad specs for the hype that surrounds it!