I have a Dell Axim X50v, and I just updated it to the unofficial Windows Mobile 6 OS. It is a VERY nice PDA now, with VGA screen, accelerated 3d graphics, high quality audio, WiFi, Bluetooth, SDHC, CompactFlash, and a fast 624MHz ARM processor. Dell doesn't make them anymore, so you can pick one up on eBay for around $150. I use mine for MP3's, videos, Web browsing (occasionally), watching YouTube, taking notes, and playing games.