Optimal Workstation for CS6

Hi Cattle Herders,

I have the opportunity to suggest to "he who holds the purse-strings", what kind of new workstation to buy.
I work primarily with CS6 creative suite, Cinema 4D R13 Broadcast, and need to keep an Avid Software possibility to open my old Avid projects. It must be a PC because the whole company is based on PCS, and to ask for a Mac would open a big complicated can of worms. I have no predjudices. MAC or PC; Bosch or Makita. Tools are Tools.

Heres what I'm thinking...
A HP Z620 with the new Xeon E5 processors
32 Gigs RAM
Nvidia Quadro 4000 Graphics card
2 TB Harddrives, with a mirrored RAID Array.
AJA Kona 3G I/O Card.

But I'm not to sure what the relationship is between the AJA card and the graphics card is. Does the AJA card support or speed up the previewing or rendering times through the computer? Or is it purely for the External Viewing? Is a Quatro 4000 enough? Or should I recommend a 6000? And why?
If anyone has better suggestions, or can comment on what I have proposed, I would love to hear.

Thanks in Advance
Simon

A picture is only as good as the glass it comes through. And the person using the camera has something to do with it too.