Best Video Card for Photoshop / Calibration with Monaco Optix

I am a photographer. I need a new video card. I use Monaco Optix for calibration. XP Pro.

I seem to remember that my calibration software likes nVidia cards, so I prefer to stick with nVidia. Im not a gamer, but I need a card that works well for calibration for digital photo work. I do not need frame rate and rendering like a gamer.

What do you recommend. Below is my system...

-Abit IP-35 Pro Rev. 1.1 motherboard with bios dated 5/26/2008 (Intel P35 Bearlake chipset)
-4 gigabytes G.Skill dual channel DDR800 (PC6400-CL5) memory (2 X 2gb sticks)
-Intel Core 2 Quad Q6600 Processor with 8mb cache @ 2.4 ghz - G0 revision(easily overlocked to 3.0ghz at 1333fsb).
- NEC CRT.

Is is true that my card requirements are somehow less than a gamer? Calibration is the important thing to me. What nVidia board(s) are best for me. Any great values that are one step away from the bleeding, expensive edge? I see 8600 GTs and lower model numbers on sale on CL and in local surplus stores.

Help me choose a card !

If you are not planning on gaming a low-end graphics card should suffice, that way you dont need to worrk about power connecters etc.

What graphics card are you using now?