Hey friends. I am thinking of upgrading my Mac Pro (5,1 Mid 2010, upgraded a bit: Processor 2 x 2.66GHz 6-Core Intel Xeon, Memory: 8 GB 1333 MHz DDR3, Samsung EVO 850 500gb SSD) to give me more speed/power. I use Logic X extensively (a digital audio workstation), as I am a composer, and I have been running into a lot of overloading issues. I think it comes down to the limited power of each individual core. I am thinking of buying 1 or 2 of these CPUs: Intel® Xeon® Processor X5690 (12M Cache, 3.46 GHz, 6.40 GT/s Intel® QPI) 6 core Or 1 or 2 of these: Intel® Xeon® Processor X5687 (12M Cache, 3.60 GHz, 6.40 GT/s Intel® QPI) 4 core I would love some feedback from anyone who has made a similar upgrade. It would be even more valuable if someone had made the upgrade for the sake of a digital audio workstation, and could give me feedback on how it went. I really appreciate any feedback or advice people can give me! Cheers.