My current laptop is nearing the end of it's lifetime and may very well be past it. I wonder which notebook is a good, solid choice of high enough quality to last a couple of years and will work fine with linux / kubuntu.

I was eyeing the Zenbook, but came across a couple of reviews complaining about the bad keyboard.

Looking for something reasonably portable (e.g. 13")

Also I try to stay away from Apple (read Air).

Every answer is appreciated, even if you feel really strongly about Mac give it a go, I might give in, who knows ..