If I were you , I'll go for Dell XPS. Looks nice. Gaming monster. Any computer shop would love to service your machine. Okey, just leave it to us and well see what the problem is. Then, you will be presented with bills they "allegely" spent. Kiss your laptop goodbye, then.
Alienware? No service center in Canada. I won't even think buying this one.
You can find used Qosmio at ebay and local ads. I wonder why people re-selling this laptop. This one too, any technicians would love to get hold of this.
Never had Acer before. Actaully, I never seen one, any model, in person before until now.
I'll stick to my Compaq R4000. Costs less than twice as much any of the above. Runs any games too. Just give it right TLC and won't get into the hands of technicians.