I know threads like this really don't usually end up going anywhere, but I'm pretty much at an impasse about which machine I should replace my old 13" MacBook with. Right now, I'm stuck between getting a maxed out 13" non-retina MacBook Pro (with an aftermarket Samsung 256GB SSD) or the standard 15" Retina model. Essentially, the former will run me around 1750 when I'm all done, but is it worth it to spring for the 15" Retina. As I see it, the only advantages would be the screen (which, after seeing in person really is beautiful) and the GT650M. To me, the added bonus of the discrete graphics really is a big deal, but it isn't necessarily gigantic. While I don't do heavy video editing or photoshop, I do do a good deal of multitasking and music production (with apps like Logic and Reason). Essentially what it comes down to for me is whether or not I should spring for the 15"? My plan with the 13" was to dual drive it with the stock 750GB in the optical bay, but part of me wants that shiny new retina glory. These are the main questions I have: Is the jump from the 2.9GHz i7 dual core in the 13" to the 2.3GHz i7 quad core in the 15" model a big jump that warrants the difference? If I go with the 15", is the 8GB of RAM going to last me the 4+ years I intend to have the system? Is the HD4000 going to hold me back in the 13" or is the 650GT worth the extra oomph for the longevity of the machine? My main concern is that, by buying the 13" non-retina, I'm buying a product that has a high likelihood of not existing upon the next refresh. Therefor, does it make sense from a longterm investment standpoint to buy the 15" for the support?