i am using the first generation macbook air of 1.6 ghz and core 2 duo. The new 11.6 macbook air spec is 1.4 ghz and same 2gb ram. Is my mba comparable in terms of speed to the new macbook air? i always had a problem when watching HD video or youtube when it start to get hot. The video will be laggy and jerky and i have to cool it down a while and then is ok.