The big update is that the Mac Pro shifted from 45nm Nahalem processors (other than in the $2,500 base model) to 32 nm Westmere processors. Those holding out on the processor generation jump to buy a new Mac Pro, it looks like that time has come. Choose your cores: 4, 6, 8, or 12 The new Mac Pro offers two advanced processor options from Intel. The Quad-Core Intel Xeon “Nehalem” processor is available in a single-processor, quad-core configuration at speeds up to 3.2GHz. For even greater speed and power, choose the “Westmere” series, Intel’s next-generation processor based on its latest 32-nm process technology. ”Westmere” is available in both quad-core and…