Go with Matrox G450 or G550 if you want just great 2d.
If you will game and want acceptable 3d as well, go with ATI(ATI has good 2d but is not as good as Matrox).
If games are more important, go with nVidia or maybe check out the new GF4 for 2d quality too cause that may be another option as well considering they have "supposedly" vamped up 2d support.
If multi-monitor is another concern, it's also in the same order as above, Matrox, ATI, and then nVidia.