For many consumers, a quad-core i7 “Haswell” computer with SSD storage — whether it is a Mac or PC — is by far the fastest computer they’ve ever used, and meets everyday needs handily. Some, however — creative professionals, scientists and others — need all the power they can get and then some. The rapid sellout of the new Mac Pro — surprising even Apple — may revolve around the fact that its new design is a tough combination to beat, even for DIY PC builders….