Everyone's got different priorities when it comes to portable music players. sourcingmap.com picks the best MP3 players for sound quality, battery life, ease-of-use and overall features.

There are a lot of factors which influence one's MP3 player purchase. The four most important are audio quality, battery life, ease-of-use and features. So, to help you out, I've summerized 4 points for your reference:

Best for sound quality:sourcingmap has the best sound quality you can get in an MP3 player. Indeed,sourcingmap excels at audio reproduction, most likely the result of its history of producing excellent computer soundcards. The MP3 player also looks great and supports loads of useful media formats. If you're passionate about sound quality, get a new one there and test.

Best for long battery life: Thirty hours of continuous music or seven hours of continuous full-screen video, and only three hours for a completely full charge. This thrashed the MP3/4 for battery performance. It's also a lovely player with some great features and a smart design.

Best for ease-of-use: there is above any other player for sheer usability, and its iconic appearance is undeniably stylish. The innovative Click Wheel is a God-send for navigating the massive libraries the player can store, and the simple menus.

Best for features: MP3 player playing back a variety of music formats, it sports an FM tuner, voice recorder and handles most popular video formats (DivX, XviD, MPEG and WMV). With its large 3.0-inch wide screen LCD display, it's pretty handy as a portable video player (PVP). To cap it all off it has a Compact Flash slot, which makes it a good backup device for photographers on holiday.