Within the next few weeks the C6500 will debut but will cost more.
It will be about 16 lbs Lighter than C650
Wide Color Enhancer Plus
MegaDynamic Contrast Ratio whereas the C650 CR is the same as last year.
1.1" Depth vs 3.4" if thin and lightweight means anything to you at just under 50 lbs with stand.
More energy efficient being LED if that matters.
When C7000 debuted it's CR doubled from 2009 model.
other improvements for 2010 that have to do with internet and ap's versus 2009 models.