I'm building a rig for 3d work mainly, planning to do a lot of gpu rendering with vray RT in 3dsmax.
I also been reading a lot this past weeks about different gpu options. After giving it a lot of thought I'm going for a GTX 780 for viewport, and a GTX Titan for Vray RT. Mainly due to the 6gb of the Titan, thinking next year I could buy another Titan and make them work in SLI, and with those 6gb it would work well for some years.
And for scenes with lower ram requierments I could use both the 780 and titan for rendering.
What would you think about these setup, any suggestions?