I am currently using a dual 867 mirror door G4 with 1 G ram and 256 Radeon vid card. It runs tiger. the cd drive is broken and watching HD youtube vids is a chore. the vid card leaves artifacts on the screen when you scroll down. Some sites lag this mac. The sites with all the ads and stuff. I want to get the new mini. I plan to get either the new iPhone or iPad, so I will need the new OS. Dont want to spend the $$ on new OS for current mac. My needs are small. Surfing the net, posting on forums, email. The only games I want to run are Quake 4, Diablo 2, thats about it. I use my PS3 for all my gaming needs.