My gosh after reading all these post it seems to me you people don't know what you're talking about. I may not know technically what I'm talking about either, but here is my experience and it is based on fact.
1. I bought a new computer in March/2008 which has a Asus P5GC/MX1333 motherboard and the onboard graphics that is built into the motherboard did not display as good a picture on my 19" Sony CRT monitor as the nVidia GeForce 8500 does.
2. However, the GeForce 8500 sucks compared to the Diamond G640 video card (in another computer built in 1997 Pent II) that I used to drive the same exact Sony monitor with. I mean there was a huge difference in text and picture quality.
So, to the original poster. Whatever you do, do NOT buy one of the PCI-Express nVidia cards like the 8500, 8600 or 8800 for 2D work. These nVidia cards are designed for gaming and their picture quality quite frankly sucks.
Now, the best cards for 2D seemed to be manufactured between 1999 and 2001 as AGP or PCI slot cards which presents a dilemna for you and/or people like me who have PCI-Express slots, but are only concerned about 2D picture quality and color. Most everything designed now days for PCI-Express is the 3D garbage for gaming that cost 150 to 300 dollars. From what I've read the Matrox G550 (PCI-Express) is very good, but not quite as good as the the old Matrox G450 (AGP slot). So, I can not write an ending to this story as I am still researching it. But it is frustrating because of all the nonsense over 3D, and what about the rest of the world that doesn't go gaming?