SanDisk Sansa Clip Zip (blue, 4GB)

Pros: Better sound than just about all the mp3 players out there
Super portable. Excellent for the weight room
Really good feature set
Really inexpensive
Decent headphones

Cons: Construction is sub par. Software freezes from time to time
Life span is questionable

Summary: This the best option right now for people looking for an mp3 player for the gym or jogging. It is super light. The sound quality is excellent, better then any Apple products or any Android phone Ive listened to. The feature set is over the top. Radio, sd card slot, voice recorder. Really inexpensive especially for the features you get. Ok let me get to the down side.
The quality is not the best. I have owned 4 of these clips so far. In my experience only one of them lasted a little more then a year. The one that lasted the longest still works except for the fact the screen is dead lol. If you are looking for a feature rich great sounding mp3 player that is portable but has a life span of approximately 9 to 12 moths then this is your baby. I strongly recommend getting the warranty on this one, your most likely are going to need it. However for the price online for under 35.00 dollars I would buy it again. There isn't anything else out there that is ultra portable and sounds as good. Just make sure to back up your music or use and micro sd card.