Hey Mark
I got tired of waiting for the new Mac Pro and built a Hackintosh (
http://www.adamroberts.net/blog/davinci ... sh-part-1/) earlier this year. It worked out cheaper than the top of the line iMac and it more powerful. So a PC to run Resolve should not cost that much.
Resolve need GPU power more than it needs CPU power. So you really want to get the best GPU you can afford. Sadly the new Mac Pro does not come with that many options. However Blackmagic have said that Resolve runs very well on the new Mac Pros. We will have to wait to see the results.
Personally I would get the 6 Core version as it has the better GPU:
"Dual AMD FirePro D500 graphics processors with 3GB of GDDR5 VRAM each"
2GB of GPU VRAM is currently the minimum that BM suggest for Resolve if you are working in HD. More for hight resolutions.
As for RAID. I'd look at a Thunderbolt RAID. I run a Promise Pegasus R6 which is great:
http://www.promise.com/storage/raid_ser ... 40&rsn3=47Promise now offer a Thunderbolt 2 version:
http://www.promise.com/promotion_page/p ... al&rsn=100I think that would be the best option on the new Mac Pro. The Promise is so easy to set-up and manage.
UltraStudio Mini Monitor would be the cheapest and simplest option for connecting a calibrated display.