I am looking to build a PC to run solidworks as my curent machine is begining to show its age.  I have built many systems for home use but never a workstation.  I have chosen components that I would use to piece together a home system and I am wondering if they are robust enough to build a workstation.  Please let me know what your concerns would be if any with the folloing components

AMD Phenom II 965 (4 x 3.4Ghz) Processor - I have been a fan of the AMD components forever and the Intel counterpart is just to expensive.

MSI AM3 Motherboard built around the Nvidia Nforce 980a chipset - this will support 1333Mhz memory and the above proc

Nvidia Quadro FX 1800 pci-e video adapter - is this better than an older Quadro FX 3450?

8Gig of 1333Mhz memory

850 watt power supply

I am wondering if the Nvidia Nforce 980a chipset will play well with the Quadro video card - I noticed that the manufacturers of workstations are using workstation specific chipsets.  So far as aspeced this amounts to about \$1550 and I am trying to keep it under \$1600.  Any advice?