Opinions on other companies: Lenovo: No way. HP: no. Acer: You know you are buying cheap. Don't complain when it is cheap. Opinions based on repairing at least two of each brand for friends or family.
It's all about product experience. SK dislikes Lenovo, but I haven't had a problem with them (note, I'm 2nd in command over our small IT shop, I hear about and deal with tech problems).
Whereas, SK likes Toshiba, but I'm not entirely happy that they almost didn't cover a bad video part on my less than 1 year old Qosmio that cost $1800. I think that's a huge risk for a customer that the 1 year warranty wasn't going to be honored. If I hadn't gone in to Fry's AFTER calling Toshiba about the problem, I'd have been screwed. The Fry's service tech was the only reason I wasn't screwed.