I was wondering what you guys thought about the upgrades I'm thinking of doing. My primary Mac is a 2006 Mac Pro Dual 2.66 with 4gb ram and Radeon X1900. Right now I'm still running 10.4.11. Once Snow Leopard comes out, I plan to upgrade to 8gb ram and add the Radeon Hd 4870 in order to take advantage of Open CL (I know it isn't officially supported, but from what I can tell, it works flawlessly in the 2006 Mac Pro as long as at least 10.5.7 is installed.) I don't do much heavy work, lots of internet, youtube, word processing, HD Video Viewing, lots of garageband, audio editing and basic video editing/converting. No photoshop and only the occasional game. Would this upgrade be worth is and does it sound like a set up that will extend the life of my Mac Pro for the foreseeable future assuming I use it in the same way as I do now?