Hi all, I'm trying to decide whether to buy a Rev. B 1.86GHz 128GB SSD MacBook Air now or should I wait? I had a Rev. A 1.6GHz 80GB HD version and it was a piece of crap. It overheated all the time when playing videos and kernel_task kept using all the CPU power. Furthermore, it was slow and things like Expose were very jerky. I plan to use it as a second computer to my MBP. Are the problems of the Rev. A rectified now? Do you guys think it is worth getting one now?