Im running Tiger on an eMac 1.25 Ghz 1 GB Ram with no Core Image Support (ATI 9200). Seeing how support is being dropped like crazy from the best release of OS X ever, (Tiger), I'm going to have to move on. My question is should i expect a performance hit? will the dock still reflect icons and windows? What features will be disabled? and lastly if you look at a Macintosh with no Core Image and Leopard installed it says "Core Image: Software" what does that mean? I really love my Tiger and hate to drop it (It seems more professional than the new OS X) but i want to know if its going to be worth the upgrade.