My PC is my current MP3 player, but I'm gonna get the Toshiba Gigabeat S MES30VW 30GB soon.
Here it is next to the Apple iPod 5G:
2.4"/ 320x240/ 65,000-color QVGA screen. It uses Microsoft's PMC (Portable Media Center) software for it's UI and it's VERY organized and intuitive.
It features two modes, portrait and landscape. Normal music playback can be through the portrait mode while video can be through landscape. The casing is made of scratch-resistant, anodized aluminum on the back (isn't a scratch magnet like the iPod) and has a glossy plastic front.
The dimentions are 3.93"x2.3"x0.58" and it weighs about 4.8 ounces (the 60GB weighs a little more at 5.3 ounces).