6900CF & Nvidia card working together.

Hello I have a question. I recently bought 2 6970's that replaced an old GTX 295. After I installed and adjusted the colours in the AVIVO control panel in CCC I still couldn't get the colour balance right....either too vibrant or too dull. Then it hit me, I used Digital Vibrance with my previous Nvidia card. Now I know about how ATI doesn't have an option equivalent to DV, I've looked through hundreds of forums on this discussion of DV, I also know some people have different opinions on DV but it really helped the colours pop out of my monitor.

I've tried adjusting the contrast, saturation, brightness. No dice.

So I was thinking....maybe a little off the ball here, but I know it's possible that you can use Nvidia cards as a dedi phsyx card with ATI cards as the main output. Is it actually possible to stick an old 9800gtx, have it as a dedi phsyx and use Digital Vibrance?

I have a gut feeling this is not possible, because of driver conflictions between the Red and Green cards.

But who knows, it maybe possible. Also If anyone actually does know about a 3rd party app (not powerstrip, already tried it). Please let me know. This is driving me crazy, I don't want to have to RMA my two new 6970's over a retarded colour slider and have to get 570gtx's but I am actually considering it.

Other than that can anyone suggest a good monitor with good saturation levels?

Mine at the moment is an LCD VH226 ASUS.