I have 2 laptops in my house, one of which is advent, the other is packard bell. The packard bell one doesn't move ever but is 2 years old and the screen has gone, got lines going down it, the advent hoever i am surprised at. It has, quite litteraly, been dropped, thrown around, basically had the crap beaten out of it and still works a dream!! Only ever had one problem but that was software related that was easily fixed by rolling back, but they are a good make.
From the list you have got, Dell would be good for reliability, robustness and looks, Toshiba are good for the same reasons, however are not quite so tough from experience