I updated my post with acceptable mobile GPUs, as long as you take care that your new Notebook has such a GPU you will have a lot of fun in games.

Well the Asus G73JH is for example a payable notebook with a ATI 5870 (DDR5), the Deviltech Fragbook DTX is cheaper and got the same GPU (Mysn ones are pretty the same).

My suggestion is to wait for April, as I said MSI and other companies will release way cheaper notebooks then with GPUs like the 5870 (DDR5) (But I guess also with a lower quality and no Full-HD). Still if you want a high quality notebook with warranty and a nice design now, then go for the Asus G73JH.

The best gaming notebooks are made by Alienware, but there you pay 2000$+ and they got no 5870 GPUs yet!