I need an mp3 player for my mother-in-law's business. She has been using an 8gb iPod connected to a "stereo" receiver but she needs more space now. Turned off by prices of new iPods, I'm looking for a cheapish player that isn't likely to die on me randomly, very preferably with a microSD slot. I'd like to put a 32gb card in it. Something like a Sansa Clip might be ok, but I'm worried it might not like me dumping 10,000 cheesy Christmas songs in a folder and hitting shuffle. I need something that can play music while charging via USB (I don't think the Clip can). The ability to import a playlist OR the ability to sort music via folder is essential. She has a Mac and is familiar with iTunes but I could introduce her to other programs (that run on a Mac). What do you guys recommend?