I vote Blaupunkt MP3000.
I've owned (2) of these now in seperate cars, and for the budget-minded, it's got a ton of great features!
CD-R, CD-RW, CD, WMA, MP3 (variable and constant bit rate)
I've never had skipping problems that were a fault of the MP3000, most were my own computer burning errors. A great deck, you can pick it up for only $118.00 here: