Hello! I need advice on upgrading. The last 15" MacBook Pro I have is from 2005. It's still a good machine, but it's not doing what I need to do now that I'm a full time freelancer, so I'm looking to replace it. I have no idea what the current Macs are like, other than the fact that pretty much almost anything I buy will be better than what I have now. I'm definitely getting a 15" again, I like the size. Generally I'd like to spend somewhere in the $2500ish range, maybe more, hopefully less. I'm wondering whether I'll need the retina display. It seems more like it's in the "nice to have" category rather than "need to have". In the non-retina MBP, is it worth the $250 to upgrade to 2.7GHz Quad-core Intel Core i7 from the 2.6GHz? I'm typically running Illustrator, InDesign, and Photoshop at the same time, but more recently I've been running Flash as well. I'm mostly a print designer but I've been doing more and more animation & art for online marketing, games, etc. Any and all opinions are appreciated. Thanks!