Are you using your laptop as a desktop replacement, for travel, or both?

I go with the "for travel", so for me it's all about weight. I like a very lightweight laptop. But it also must have a good keyboard. And good battery life.

The sacrifice is screensize. But a small screen is fine when I am away from the office because I dock at my desk and use a 20 inch monitor. The laptop supports high rez on an external monitor anyway.

In addition, the M means the Pentium isn't clocking its fastest most of the time. Big deal. It is very efficient and quite fast at 1.4MHz. A laptop that is very small has other compromises too, probably a slightly slower disk access, and the clockspeed on the processor is of no consequence given the other compromises.

If you want a "desktop replacement" laptop, then it's a different story...