well same here. apart from my ATI card is the Rage 9800 pro, yes it displays one screen res a 16colours... go ATI (my very first card) my nVidia is the 5900
I recommened the ATI because I know its the best mobile card availale. Personally I have a FX 5650Go in my laptop which was the best one that was available when I got it. Thats why I have the nVidia logo.
I got the Mobile ATI Radeon 9600 in my laptop (specs below) and it runs good. even Halo which is a big hog on processor speed and resources. but my desktop has Nvidia, they both work well.
Gaming on a laptop..... tiSk, tiSk. You're going to add four pounds to a normal notebook, take away a couple hours of battery life from a notebook, and add a couple geEz, for a gaming notebook. If you insist check out this AlienWare out, even though it doesn't come with a ATI card.
Hypersonic makes great laptops, but if you get a paintjob it takes close to a month for them to ship out your laptop to you.. But they look great and are great lol..
However, they look the same as Sagers, which you would want to get one from PCTorque (http://pctorque.com), with or without a paintjob dont matter, though the paintjobs are expensive, the 5690 and 8790 run games great