I have a 2009 Asus G50VT gaming laptop with the X9100 top end CPU and I've been running seti@Home on both the GPU and CPU since the beginning and have not had a failure. I guess mine is pretty reliable even faced with full load, lots of heat nearly 24/7.
That being said, I don't like their G750, it's too big and the CPU isn't upgradeable. Think MSI is doing it right with their GT60, GT70 laptops.
I wish w00t would occasionally offer really good deals on gaming/workstation laptops.
Of course the best deals are gently used laptops on Ebay.
Used laptops should be avoided in general. The cost of replacing the battery is usually much more than the potential savings