There are a few good threads on this already.
But, I just bought a new laptop 2 mon ths ago. I am pretty sure this still applies to ANY win 7 laptop:
You get a promo code for Win 8 Pro upgrade. I used mine, haven't installed yet. Point being you can image the laptop with windows or 3rd party and then you can don't really have to worry either way. I am still waiting to install Win 8, but I downloaded my $14.99 version and made a ISO already. Really just waiting until I get my SSD Intel 335 240GB from Amazon to put in the laptop