1920x1200 is a hardship for any single graphics card setup unless you're willing to sacrifice some of your other settings - AA/AF/shadows, etc. The higher the resolution, the slower the response time as well.
I think there's a patch out that allows BF2 to run in widescreen, not entirely sure though.
The two best widescreen monitors currently available for gaming, according to xtknight and many others are the NEC 20WMGX2 and Dell 2007, both at a resolution of 1680x1050 which your video card can handle fairly easily. The NEC will be the most impressive, but it costs around $600US. There are also some fast 19" LCDs out there at lower cost, like the Samsung 931C, but they're all 6-bit TNs, so the color tends to be poor by my eyes.
The other option is to wait a few months... LCDs with improved backlights are coming soon and some improved panels as well.