Fuze+: Recommended Portable Stereo

Does Sansa recommend a particular portable stereo for use with their Fuze+ (officially or unoffically)?  I enjoy my Fuze+ but much prefer external speakers over headphones.  I’m looking for something portable with clear sound, rich bass.  Classical, Jazz, and 70s / 80s Rock preference.  I don’t want to rock the house but I’d like to enjoy the sound when I’m 20 feet away in my backyard (interference from barking dogs, wife, and obnoxious neighbors excepted).

Any portable stereo with an auxiliary input will work with the correct cable (depending on the input) will work.  I have a pair of powered computer speakers set up in my kitchen for this purpose.