Hi, I'm trying to make the right choice for my new desktop, and I was wondering to go quadro or geforce sli (quadro 4000 / gtx660ti x3 / gtx670 x2) since I work with Revit, 3ds max and PS. I've read something on the forum but no one says anything abouth the differences between tripple sli and quadro or between the vieport manipulation performances and the rendering speed between the quadro and the gtx, because I'v read somewhere that the Geforce is quite faster for rendering. So, please... if someone could help me... thanks.