I'm planning to e new iMac... and this i sthe configuration thka i'll think to choose, for you is adeguate to VDMX ?
Mac 27" con display Retina 5K
Intel Core i7 quad-core a 4,0GHz (Turbo Boost fino a 4,2GHz)
16GB di SDRAM DDR3 a 1867MHz (2 x 8GB)
Fusion Drive da 1TB
AMD Radeon R9 M390 con 2GB di memoria video