which processor is better? A used mid 2010 Intel Core i7 2.8 GHz Processor (2 cores,still under applecare til oct) Or an Apple refurbished jued 2012 2.5 GHz Dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) Does the 2010 not have a turbo boost? What does the turbo boost do? I am looking for a mac to succesfully run Omnisphere which requires a 2.4 ghz processor. And it is for live music performance.