Hi William
This HP station is only 4 cores !
The 12 core HP station is 9999 $ and that without graphic cards and without Thunderbolt
http://shopping1.hp.com/is-bin/INTERSHOP.enfinity/WFS/WW-USSMBPublicStore-Site/en_US/-/USD/ViewProductDetail-Start;pgid=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx?ProductUUID=tdMQ7EN5zgQAAAFBXYFNbJcf&CatalogCategoryID=x.IQ7habXDwAAAFCulgtkXzC&JumpTo=OfferList
The link you gave us does not compare to the high-end 12 core Mac (2.7GHz 12-core with 30MB of L3 cache) that is at 6999 $
You can buy this 6 999 $ Mac at Apple and buy the memory and SSD extensions elswhere (Crucial .......)
Our main concern is going Thunderbolt, the Thunderbolt to PCIe chassis are quite expensive at the moment because Thunderbolt is only starting, and we have audio cards !
Best
Cyril