And boy has it made a difference. It's a 2010 i5 2.8Ghz, 8Gb Ram, 27". I put in a 500 Gb Ssd from Crucial after reading this review from Anandtech.
I think I might up my RAM to 12 as well.
I ordered the necessary tools (Specialized Torx wrenches) from OWC , and followed the instructions from fixit. You DO need to be careful, as some of it is fine work. I had a friend from Apple come look over my shoulder. Probably not necessary, but made me feel better.
Logos loads itself and my layouts MUCH faster. That's not to say there's no beachball anymore, but we're talking a few seconds instead of 20. 