If you haven't decided quite yet (can't tell if you've already got your heart set on something or not) and you're looking for a few more options, here are a few others I'd recommend taking a look at.
Lenovo has two series of notebooks, the IdeaPads and the ThinkPads. The IdeaPads, as far as I can tell, aren't overly customizeable. They have quite a few options to choose from, but once you pick out something, it seems that you're getting that hardware. ThinkPads tend to be more expensive, but you can pretty much customize anything you want. I'd at least take a look at them to see if the pricing/performance fits your criteria.
ThinkPadsIdeaPadsIf you're looking for a low-ish priced laptop, it looks if you go under the Laptop models and sort by price (less than $800) you've got a few options to look at. They've got 4 NVIDIA GPU laptops, three of which are 256MB GeForce and one of which is a 128 GeForce.