Acer is the least reliable in my experience.
Asus, Toshiba, Fujitsu, Dell, Samsung, LG, should all be good.
Avoid Acer the most. Also you should look past HP, Compaq, and probably Sony since it's overpriced. The first list of brands should have good enough deals that you don't need to consider these ones.
Asus has a 2 year international warranty on their laptops. I have an Asus and am happy with it so far. Dell have been my favourite overall though, but they only put good video cards on their huge models.