Hello, I got the rMBP 15" 2012 when it came out. It has 2.6GHz i7, 16GB 1600 MHz DDR3, Intel HD Graphics 4000 512MB with Nvidia GeForce GT 650M 512MB, 751 GB SSD. It was great but for the past few weeks, it has image retention problem. How is it compared with the latest top-of-the-line rMBP in terms of performance on scientific calculations, simulations? For 3D CAD such as 3D Max, SolidWorks, does the latest top of the line system runs noticeably faster than the one I got?