Was hoping for some input on a workstation upgrade. Not sure if I will build it myself or get something prebuilt and either customizing myself or have it custom made.

I use Carrara mainly, but also do some work in Lightwave, photoshop, and some Zbrush. 

I know I will be getting an i7 (likely 2600) processor but would also like to improve my opengl.  I use currently on my Asus i5 pc a nvidia gts 450 and was thinking up trying maybe the Quadro 600 or even the Quadro 2000 on my next build.

What are your thoughts on this?

Thanks for any input!