My brother got a Dell recently. Luckily he got it second hand pretty cheaply coz when we opened it up it has no graphics card slot at all. Just 32mb integrated video.
What's the point of a 2.8ghz CPU when it's stuck with a 32mb integrated video chip with no way of upgrading. How much does a graphics card slot cost to attach to a motherboard?? On the basis of this I would certainly not buy anything from Dell.
Sorry, but if Dell want to limit their upgrading possibilities then they will also be limiting their customer base.