Hello, I'm a bit in a dilemma and i hope you can shed some thoughts on it. I have the opportunity to buy an used(~7 months, still in the first year warranty) 27' iMAC 2012 with 675mx at around ~1650$ or i could go after an refurbished 2013 iMAC with 775m at ~1950$. I didn't list the other specs because both are more or less the same...the differences in cpu perf are negligible. What would you guys do? Does the 775m or 2013 model worth the extra 300$? It's very hard for me to decide because the both options have advantages and disadvantages, i guess 675mx is enough for my gaming needs but the 2012 model is getting outdated slowly where the 2013 model is newer and it's like a new machine with minor details like AC wifi(not that would matter much) Thanks!