building pc for 3d rendering

[maaxcro]

hello, I am planing to build a new pc for my daily work
I work in 3d Architecture field, I use 3ds max/VRay/Photoshop/Zbrush mainly

Intel i7 4930k
Gigabyte GA-X79-UP4
16 GB Ram Kingston 1600
Nvidia GTX 760 4GB
120 SDD + 2 TB Hard Drive

most important part for me is the cpu and I guess its pretty good 6 core
but I am wondering about 16 gb Ram & gtx 760 are they good enough or not, I am afraid especially if I end up with scenes more than 6 millions polygons
shall I add more memory or even buy 770/780, or am I ok??
please any suggestions?

 

[badboyrog2]

budget??????

 

[maaxcro]

this will cost 2000 $ where I live
but I am not sure if I should pay more or is it worthless