Hi everyone, First post here, I'm about to convert from PC to Mac! WHOAAAAA Anyway, I'm set on a 2015 13' rMBP, going to max out 16GM RAM and up the SSD to 256GB because I want to future-proof it for at least 5 years. I know RAM is most important, and 256GB is more than fine (at 4+ yrs on PC and only used ~100GB memory). I'm a student, so I get the discount, and also take good care of my stuff. Previous PC was good for 6 yrs. Now about processing power, I don't think it's worth the $270 to upgrade from i5 2.7GHz to i7 3.1GHz, but what do you all think about $90 to upgrade to the i5 2.9GHz. I've seen the CPU clocking on various sites and the 0.2 GHz difference is about 5% faster. Trivial amount now, but will it matter in 5 years? Also $90 is an ehh not-huge amount and far from significant like the $270. Don't mind spending the $ but only if it matters. Battery life is important, and I was wondering if the 2.9 processor might use battery faster than 2.7 processor. Can't find a straight answer online. Appreciate any insights/opinions. Thanks!