Thank you to all the new Aluminum MB and MBP owners for posting their impressions: I am looking for some very specific information and testing... I'm considering getting my first MAC and I like the new laptops but want to get some solid numbers regarding heat, power, and noise before making the move. I really don't like noisy computers so I undervolt my current pc and laptops to reduce power consumption and enjoy the resulting slower fan speeds. With a Kill-a-watt or power meter please post power consumption with the battery removed and screen on max brightness: Idle / CPU (both cores) loaded / GPU Loaded / CPU and GPU Loaded As well please post core temps along with fan speeds for all these states. I'm also looking for impressions of fan noise and heat on the bodies of the laptops. In Windows I use cpuburn, atitool and speedfan to gather the info. I don't know the equivalent programs for MAC. Hopefully coolbook will add support for the new nvidia chipsets as my experience with undervolting Core2Duo laptops is a savings of about 10watts on the loaded end which is a lot less heat for the fan to move. If anyone has the old macbooks or pro and could post numbers it would be interesting to compare. Thanks.