Summary: The entry-level Sony B-Series Walkman is a solid choice for the gym thanks to its ultracompact design, quick charge function, and integrated FM tuner--but beware the eye strain.
Pros: The Sony B-Series Walkman offers an ultracompact design, an FM tuner and voice recorder, and a handy quick charge feature. It's inexpensive, comes in a variety of colors, and sounds good. Works with both Windows and Mac.
Cons: The Sony B-Series Walkman's rated battery life is unimpressive and the display is tiny.