Hi guys, I'm looking for macbook pro for my work trip around north pole - that's why I need something powerful. I'm photographer, graphic designer (really fat files with the huge dimension) and video editor. That's why I'm looking around for bigger version - 4 cores it's always better than 2 And I want to know from you guys, does it really change anything when I'll pay more for 455? Is it a significant boost of performance? To be honest, in Europe that series of macbooks pro is REALLY expensive. And I've barely got enough money for 450/512GB version. I was looking on the benchmark sites and between 450 and 455 it's not that big difference. Between 450 and 460 gap is huge, but I heard that 460 could make an artifacts on the screen and really heat up chassis. I really need to get this laptop with working condition for at least six month So 460 it's not my first choice. TL;DR: is it worth to pay more for 455 or 450 is really alright. My question is: is this card (450) is much better than build-in intel iris 540 from 13 model? thank you for any replies, hey!