EDIT: I am actually using a FirePro W5000 graphics card and not the Quadro. They do not have the W5000 under their parts list so I added the Quadro as a compatible card. (W5000 was $420 from TigerDirect)
This is my first full PC build. I decided to build a Workstation, CAD and rendering specific, for side work. I am not much into PC gaming since I have other hobbies, so that was not very important to me.
I typically use SolidWorks, but I also have PTC Creo and multiple Autodesk programs such as Inventor, Showcase, etc.
So far, using Creo and Inventor/Showcase, the programs run great and are fairly quick. I have not yet modeled any huge assemblies on these programs since I usually use SolidWorks, but I have to wait to get a copy of SolidWorks before I can try manipulating and rendering some of my bigger assemblies.
The build was much easier than I anticipated and turned out a lot cheaper than a purchased Workstation would cost if bought assembled.
Any questions, comments, or suggestions are welcome.