I've looked at those also mainly for portability. I have an older HP widescreen laptop, I like it becuase of the full size keyboard (my fingers are like yours). And as a fellow geek, you already know it is going to cost you more than a DT kind of solution.
What the heck, if you can see yourself using it, go for it or something like it. I read mixed reviews about the ASUS, but I love their motherboards, have 3 in fact. And as you know their tech support sucks. If cost isn't a big limit, maybe an HP mini, they have come down a bit.
I guess my comment is, that size of laptop can be really handy if you want to reference onine stuff as your working on your PC. I looked at a laptop stand the other day, just to take mine out the garage, lol.
I'm sure as you have looked around, when I was thinking of that, you can get a standard laptop, with faster CPU and memory for close to what one of those costs. So I said next one (for me) would be a standard laptop, more versatility. So, I want to know who will win... the geek who says... it is soo cool.... or the logic of what you want to do with it (grins).
Happy hunting