Either top of the line iMac, or cheapest Mac Pro with dual d700 cards, then do the owc update to get a 10-core for about $3-4k less than the best Mac Pro tower. Also just as a heads up to people purchasing Mac Pro. The new haswell-e chip came out in the fall of 2014, so apple will likely integrate this into their product line this summer or fall, that's means a 10-20 core system on 1-2 chips. Well worth the wait if you ask me, and why I opted to go hackintosh in the mean time. If I could go back though, totally would of gone the 5k IMac route
To everyone who keeps posting about multiple GPU's into s hackintosh and it gives you amazing performance, have you actually tested this? Or basing it on simple computing theory? I've had 2 Titans and a 680 inside a hackintosh and only got a few additional fps in resolve and Adobe cc 2014. Multiple cards was not worth the instability it provided. I've tried Mavericks and Yosemite, to no avail. For anyone who is considering a hack for a machine when working with clients. Save yourself the excuse filled session full of lockups and restarts. Just go with the iMac!