I've owned PCs since 1988, but I'm looking at making the switch to a Mac. Having an iPhone and an iPad, I've really been impressed with the quality and function of Apple products. Also, my 2009 Lenovo ThinkPad T500 has two hairline cracks at each palmrest. Not awful but not good. At any rate, I'm looking at refurbished 15" retina MBPs (my iPad 3 was refurbished and like new), and there are two that have caught my eye. Both have basically the same specs, but one is a June 2012 and the other is a February 2013[/URL]. I may be missing something, but the only difference between the two spec-wise that I see is that the June 2012 model has a 2.3 GHz Quad-core Intel Core i7 processor (Turbo Boost up to 3.3GHz) and the February 2013 model has a 2.4 GHz Quad-core Intel Core i7 processor (Turbo Boost up to 3.4GHz). That seems negligible. The price difference, though, is $270: $1599 for the June 2012 and $1869 for the February 2013. Am I missing something important in thinking that that the June 2012 is the better buy? Was there anything about the February 2013 refresh that makes it worth $270? Was there anything wrong with the June 2012 that Apple improved or corrected with the February 2013 refresh? Thanks much.