For the last couple months ive been planning on getting whatever i can for my macbook pro 4,1 on kijiji and purchasing the next refresh. however, i recently got my mbp back after being sent out due to the screen fading. it now has a brand new top case/ screen and looks pretty much brand new. i'm now starting to consider just upgrading this mac and keeping at around for another year or so. i do alot of graphic design work mostly using photoshop/illustrator. i don't really use anything else more taxing than that. the mbp tackles my work pretty good for the most part but when opening a really large file i will beachball, and using some of the more advanced filters and features make photoshop hangup for 20 seconds or so. my question is if i were to upgrade the RAM from 4GB to 6, would this make a difference for photoshop work? I also would get an SSD as soon as they drop in price. basically, for doing photoshop/design work would upgrading from 4GB to 6GB RAM and adding an SSD eventually be a big performance booster for my macbook pro 4,1? also, would moving from a core 2 duo to a sandy bridge processor make a big difference for photoshop design work?