Photoshop & Lightroom: How do I compare performance of tested GPU cards?

"Tested video cards for Photoshop CS6
Adobe tested the following video cards before the release of Photoshop CS6 . This document lists the video card by series. The minimum amount of RAM supported on video cards for Photoshop CS6 is 256 MB.

Note: Adobe tested laptop and desktop versions of the following cards. Be sure to download the latest driver for your specific model. (Laptop and desktop versions have slightly different names.)

nVidia GeForce 8000, 9000, 100, 200, 300, 400, 500 series

nVidia Quadro 400, 600, 2000, 4000 (Mac & Win), CX, 5000, 6000

AMD/ATI Radeon 2000, 3000, 4000, 5000, 6000, 7000 series

AMD/ATI FirePro 3800, 4800, 5800, 7800, 8800, 9800, 3900, 4900, 5900, 7900

Intel Intel HD Graphics, Intel HD Graphics P3000, Intel HD Graphics P4000

Note: ATI X1000 series and nVidia 7000 series cards are no longer being tested and are not officially supported in Photoshop CS6, but some basic GL functionality may be available for both these cards."

Does anyone know where we can get a comparison of the performance of these cards for PS6? Contacted adobe and they say they don't have the data..........Didn't they test the cards?

They range in price from a few hundred dollars to over $10,000. There must be a level that will suit most professional small business photographers vs high end advertising professionals.

Which Geforce is comparable to what Qudro or why are they different pros n cons. etc etc

I am considering the nVidia Quadro 2000 which has 1Gb on board.
Wondering which cards are comparable price vs performance wise? Or what benefits this or others have to each other.