These videos show how much the DS Lite is better than the original DS.

http://video.google.com/videoplay?docid=5455058694384613165&q=ds&hl=en

http://video.google.com/videoplay?docid=-7876737705463112330&q=Nintendo+DS+Lite+Second+Look&hl=en

http://video.google.com/videoplay?docid=-4939700378231043680&q=Nintendo+DS+Lite+Third+Look&hl=en

If you don't have a DS Lite, and are still considering on if you should get one, this should help some.