Hi, I want to be able to play hi-spec games on a mac. I currently have a MacBook aluminium Intel Core 2 Duo 2Ghz, nvidia 9400m and 4GB Ram. A lot of hi-spec games run a little slow, for example Civilization 5 is a bit jumpy. I really want a good gaming laptop, I'm not one for sitting at a desk to it defiantly needs to be portable. I would love to get a new MacBook Air however the 13 inch has a lower processor speed than my current MacBook but the fact that it's and i5, does it make it faster? Will that and the upgraded graphics processor made a good difference to the gameplay. I would rather not get a MBP but if its what it takes to have a good gaming experience then I will.