Quote from Mr_You:
If you're Intel CPU has an HD4000 iGPU then maybe leave a PCI slot open in case the iGPU isn't good enough for you. Then later you could decide which 3D GPU you might consider.
But to answer your question, a FirePro W600 might do all you want.
I am looking at Sapphire HD 7770 1 GB GDDR5..
maybe would need 2 of these i believe.. for 6 - 8 monitor setup..
I am thinking for I7 3930K now.. just few bucks difference .. and than i do not have to run again for few years to build a system again..