I will be upgrading my laptop soon and am looking for some opinions. I have a 15'' 2.5ghz Core2 Duo with 4GB of RAM and 512 VRAM from 2008. I'm deciding bewteen a base 13'' model to tide me over for a year while I wait for the 2013 refresh OR getting the maxed out 15'' non retina model for about $2300. I play some games like Starcraft 2 and Diablo 3 as well as lots of iPhoto and iTunes. Would the 13'' even be much of an upgrade? I really want the 15'' model because I can get the hi-res anti glare and obviously better specs but not sure I wanna spend $1000 more at the moment.