The Ars Technica piece on the "Darth Pro" hits most of the concerns we've mentioned (WRT pro usage of Macs and the necessary requirements) and many we haven't:
http://arstechnica.com/apple/2013/06...e-new-mac-pro/
The majority of the comments -- even the most admiring -- reiterate those concerns.
http://arstechnica.com/apple/2013/06...mments=1#reply