Nvidia Quadro 600, GeForce GTX 560 Ti or cheaper for Photoshop CS5 and Lightroom 3?

Question

Hello,
I am a professional photographer and I am setting up a new PC (i7, Windows 7 64bit). But I have some troubles to choose the graphic card.
I use Lightroom and Photoshop CS5 3, no video editing.
Between the Open GL, Open CL, CUDA accelerations etc ... professional graphic cards models and consumer ones I am lost!
The Nvidia GeForce GTX 560 Ti seems more powerful and more versatile but I tell myself that if Nvidia has professional range there must be a reason.
So in Photoshop CS5 and Lightroom 3 what would be the best: GeForce GTX 560 Ti or Nvidia Quadro 600?
http://www.geforce.com/Hardware/GPUs/geforce-gtx-560ti/specifications
http://www.nvidia.com/object/product-quadro-600-us.html
Any reason to get a Quadro 2000?
http://www.nvidia.com/object/product-quadro-2000-us.html
Or the graphic card doesn’t matter much and I should take an entry-level GeForce to enjoy the HDMI and the silence? Which one then?
Does the Quadro 600 manages 10bits display 10bits? And the Geforce?
Any change announced with Photoshop CS6 and Ligthroom4?
The only 3D application I use is Google Earth in 3D mode, does it make any difference?
Thank you for your help.

Answer 1

You say "no video editing"...  If that's going to be the case, and you won't use the Mercury engine in the Adobe Premiere Pro package, which needs the nVidia Cuda subsystem, then I recommend you consider the ATI brand over nVidia.
Why?
Because while neither brand's developers (ATI or nVidia) always release perfect drivers, I find ATI display drivers to be of consistently higher quality than that of nVidia releases.  What this means to you is generally fewer crashes or quirks.  ATI has also traditionally supported older cards into the future better than nVidia - this might matter to you in a few years.
People ask me what video card I would recommend, and right now that would be a VisionTek ATI Radeon HD 6670 1 GB GDDR5 card.  I like this particular card because:
I've had 100% success with VisionTek cards in a number of different systems, not only initially but they have all run as long as I have used them, without ever breaking down.
The 6670 model uses very little power (under 70 watts) and as such doesn't stress your computer's power supply, need a separate power connection, nor make a lot of fan noise. 
It's not the fastest card made for 3D gaming, but it's inexpensive and excellent for Photoshop.  No matter what you choose, you should get a card that scores over 500 on the Passmark GPU benchmark, ideally over 1000:  http://www.videocardbenchmark.net/
The ATI Catalyst display driver implementations for the 4670/5670/6670 line of cards have been good and solid.
1 GB of on-card memory seems to be a good size, even for editing a lot of images, and GDDR5 memory provides faster access than DDR3.
You should know that besides using Photoshop heavily, I also develop OpenGL-based software as well, so I have some additional insight into driver implementations.
-Noel