Regarding ATi video cards and why I dislike their drivers, there are 2 reasons. The first, is their multi monitor support tends to behave oddly. Especially on laptops. After a driver update, it may decide to move the monitor ports, or have one cease to exist, and it sometimes involves a registry tweak to bring it back. The second reason is that major driver revisions, or going from an Nvidia card in the system to an ATI one, tend to encounter major issues. If you aren't doing either of those things, the driver issues you will see will be fairly minor. The ATI cards don't have the CUDA / FERMI engine for accelerating 2d rendering apps (video endoding in adobe premiere pro, etc) or the embedded PhysX physics rendering processor, so depending on what you do, if you had the cards side by side you might notice a difference. If you don't, you probably aren't going to.