Portable Digital Players. Do you really have to ask which MP3 player is the world's best selling? 
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People love to throw around the term “iPod killer”, and if ever there was an iPod nano killer, the Samsung T9 is it. Boasting features usually reserved for larger hard drive based players, a super-sleak design and one of the most intuitive interfaces since the original iPod, the T9 trounces the nano on nearly every front. Skeptical? Read on…
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Source: http://reviews.digitaltrends.com/review4329.html
Helix XM Receiver And MP3 Player - Receives live XM content in any environment; car, home, or on-the-go Flash memory storage for up to 50 hours of XM content, MP3, WMA and JPEG files Full color LCD with JPEG picture viewer Memory buffer for catching the beginning of a song for playback at a later time Ability to create unique playlists with a mix of XM content and personal music collection XM and Napster feature allows users to bookmark songs heard on XM, then connect to a PC to purchase tracks instantly from Napster Customizable sports and stock tickers Stores XM content by song, channel, or by scheduled session 2 3/16 inch W x 3 11/16 inch H x 5/8 inch D Includes rechargeable battery, earbuds, remote, home dock, home antenna, AC adapter, USB and RCA cables and carrying case.
Of interest, another popular story talks about how to get a free MP3 Player that may be an option for some people. Will have more on ipod mini replacement click wheel later.