CFD computer configuration
 

Hello.
Our laboratory is going to buy a new computer for CFD purposes. Primarily we are using self-made CUDA based software for simulations. But also we are experimenting with OpenFOAM and Palabos. Also we use ParaView for post-processing data and Blender for rendering.
The budget is 5000$ max.

I've stopped on this configuration:

Is this configuration good enough for these tasks?
Is there any advantages of using Intel Xeon? Can I use Intel Core i7-3820 with non-ECC memory instead of Xeon?