As the title indicates, I'm planning on upgrading the processor of my machine. I have dual quad core 2.26 GHz right now, and I am looking into either: X5680 2 x 6 core 3.33 GHz ($320 for both) X5690 2 x 6 core 3.46 GHz ($420 for both) I do design, photography, some light video work and gaming. Is it worth it to spring for the X5690? Will the increased performance be worth the extra $100? I'm looking to get the most out of this computer while on somewhat of a budget (I have already put about $600 into it). I would love to hear some opinions on this. Thanks!