Hello and Happy New Year! I have a mid-2009 15" unibody MacBook Pro (C2D 2.8 Ghz, 4 GB ram, 500 GB HDD). For the past while I've noticed it's crawling compared to newer machines even with routine tasks (multitasking safari, e-mail, iTunes for example). It is also quite slow to load applications (iWork, iLife, etc.). I did a clean install of Mavericks and found some improvement, but it doesn't feel nearly as speedy as it used to. The new Retina MBPs look very nice, but my current machine is still in good shape. Would there be a significant and noticeable benefit if I upgraded to 8 GB ram +/- swapped out the HDD for an SSD? Thanks a lot!