Whats the difference between the polaroid 600 classic and the 600 ultra? PLEASE AND THANKS?

Car Stereo Help!!!!!!!!!!!!!?

• Ok so im shopping around for car stereos and im not looking to spend alot and im looking at the JVC KD-R'S, And there is like three different types and im wondering what is the major difference. Theres this one--KDR-200 http://www.walmart.com/catalog/product.do?product_id=11062592&findingMethod=rr This One--KDR-300 http://www.walmart.com/catalog/product.do?product_id=11062588&findingMethod=rr And this one--KDR-600 http://www.walmart.com/catalog/product.do?product_id=11062598 Im looking at getting the 600 but the only main difference I see is that it has a usb plug for the ipod which is very useful. The only reason I like the first one is that it comes with the bottom buttoms with the numbers 1-5 but would I really need that? But Im looking really at the 300 but I wont need the usb plug but is that really the only difference? And Please no one tell me that these are all cheap... I know they are. Like I said I dont want anything fancy im just looking for something for now. Someone help. Thanks in advance.

• Answer:

  I am gonna get the 600 as well. I was also worried about the lack of preset buttons, but once I was shown how the presets work on the 600 I was sold. Not to mention the USB port and the option to change the display colors. I know that isn't a deal maker, but it's a pretty cool feature. Actually for the price it appears to be one of the better car stereos around.