Well, technically none of the laptop video cards are supported, over, including, or under the 6800...
The GeForce 6xxx are old news video cards (mine is over two years old now). Any new laptop should come with a 7xxx series or equivalent ATI. I'd stay away from the lower end 7xxx like the 7100 or 7300 GeForce in laptops (or equivalent ATI cards) and try to get as fast of one as possible, since you are using it for gaming. Obviously a faster card is going to make more heat, and likely will also be heavier because of the added cooling. These are the tradeoffs you have to consider in a laptop when wanting to game on one (noise, weight, battery life versus performance). My laptop sounds like a hovercraft when I play SH4...and its battery life is...well...nonexistant. But in it's day it was faster than many desktops (I paid over $5000 for it, and still use it two years later). The other problem of course is once you settle on a laptop, upgrading it later is much more difficult to do....I could get a lot more life out of mine if I could upgrade the video to a GeForce Go 7950 512MB...but I can't because the cooling setup wont work with it....RAM and hard drive are easy, but you are stuck with whatever video card comes with it.
While my laptop served me well...I think I wouldnt go the same route again...my next gaming system will be a desktop, with my portable needs met with a smaller, lighter laptop used just for ordinary work-related stuff.
I know its a long post but hope this all helps you...
