Here's the one that we bought our teenager. So far there haven't been any problems. It is very easy to sync music to. We use Windows Media Mgr. a simple drag and drop. These units also come in a variety of memory sizes. I added a link so you can read some of the customer reviews:
SanDisk Sansa e250 2GB Digital MP3 Player (SDMX4-2048-A70)
http://www.circuitcity.com/ssm/SanDi...oductDetail.do