Best overall quality in my opinion are MacBook Pros but you pay dearly for that quality. In the same class in terms of build quality are the business class laptops from Lenovo(ThinkPad), Dell (Lattitude), and HP (EliteBook I think, these days). Consumer class laptops, in my experience, all have less build quality. However, business class laptops are not necessarily the best all around machines (they usually are poor at gaming).