maximum pc tested one of those in one of their recent issues - they are blazing, but 14lbs and less than an hour battery hardly qualifies as portable. They also mentioned that the next fastest unit they had tested was the lenovo w700. I set one of those up for one of my architecture clients. They had previously used a 3GHz Alienware (noisy, overheating, battery guzzling POS - IMHO) and they rendered a project, and could not believe how quick this was (we used a T9400 processor), meanwhile 2-3hour battery and no heat and hardly any noise.