Next up is a Dell Latitude E6400 (Intel QM57 Chipset, Ci7-620QM CPU, nVidia Quadro NVS160 Graphics) and whatever my desktop build will be (pretty set on AMD 880G, Athlon II X4 640, ATI HD4870).
No problems thus far. The ASUS laptop, after I installed Ubuntu it asked me if I wanted to update the drivers. I did. It's fine. Right now I'm trying to figure out how to install and run WoW on it. Not having much fun with that. But then again, this laptop belongs to a friend and I'm doing it for him for free so I'm not exactly in a hurry.
I am seeing on the Ubuntu forums, that nVidia users claim to have better performance, but have a harder time getting drivers to work. Intel stuff just works, probably since it's all low-end (although the 4500MHD seems to be very quick to me). ATI, no one seems to be complaining, so I assume they all work well or else I'd be seeing posts about ATI Catalyst drivers instead of nVidia drivers.