The Sansa Clip looks like it has good quality, but I'm not sure if it lets you just use folders instead of it sorting your music, and it uses a cable for usb. Their stick style player looked to have bad ratings for sound quality. The e200 series doesn't look like it's for me. Too many features that I don't want for too much money. The Clip still sounds cool, but I'd rather just pop it straight into my PC or car stereo rather than using a cable.
I'm digging this Sony NWZ-B105 I found while looking at the Sansa stuff. Supposedly very good quality. When I looked at it on Amazon though, people were reporting some weird issues with it. Apparently it doesn't show up as a USB mass storage device, and sometimes transfers will just cut out.