What's the difference between these models?

[GBMidge7]

Hi all... I am considering getting a new TV that I absolutely don't need right now Anyway, I see that BB has a couple of Samsung Plasmas on sale (very partial to Samsung, BTW), and the price difference between them is about $300, so I was wondering if anyone is familar with these models and may know why the one is more expensive than the other. The two models are the PN50B650 Touc of color 50" model and the PN50B550. I know the second model is not Touch of Color, but is that the only difference? CNET has a positive review of the 650 but no review of the 550.

If anyone knows of other sites besides CNET where I may find reviews so that I can compare the two, that would also be appreciated. The main reason I want to know is because the 550 is $1,100 on sale and the 650 is $1,300 or $1,400 on sale, and I want to know if the extra 3 or $400 is worth it for the 650. Thanks in advance!

P.S., I browsed the other posts in the "Plasma Displays" section and didn't find a ton of info, so I hope this isn't a repeat post of something that was already in the forums.

Also, feel free to suggest other models of similar price, but please focus on the difference of these models first and foremost. Thanks!