I have a 2010 15" 2.66 GHz i7 MBP with 4 GB of RAM. I have the regular 1440 screen as well. I have already bought and installed a 240 GB OWC SSD (Sandforce). My question is: would upgrading to the new quad-core i7 2011 MBP be worth it? I definitely want a better, higher def screen than my current one, and it appears that the new quad core machines are about as powerful as my 27" iMac 2.93. Thunderbolt looks like a tremendous technology that will make the 2011 MBP last as well. I would of course keep my SSD for the new computer if I were to upgrade. But how much do you guys think it would cost for me to make the upgrade, and is it worth it?