Hello, the specs of my MBP 2010 17" are: i7 2.66GHz, 8GB 1067 MHz DDR3, Intel HD Graphics 288MB and Nvidia GeForce GT 330. I use it for engineering applications such as SolidWorks CAD. I plan to buy a new high end Mac laptop if it comes out in March. For the time being, considering to upgrade the HD to SSD but if there is a big noticeable difference in performance, get a currently available Mac. I just wonder how a MBP 2010 17" with SSD performs compared with the currently buy able Mac Book and Air? Any good advice? MacBook: 1.2GHz dual-core Core M 2.6GHz, 8GB 1600MHz, LPDDR3 SDRAM, Intel HD 5300 MacBook Air: 2.2GHz dual-core i7, 8GB 1600MHz LPDDR3 SDRAM, 512GB SSD It seems that there are many versions of i7. For example, an i7 of five years ago running at 2Gz seems to be different from the current i7 chip running at the same speed. Am I right? How the 1.2Gz Core M in MacBook compared with the i7 2.66GHz on my MBP 17"?