I use a Toshiba Satellite Pro.... not bad build quality, and the one I have has Harman Kardon speakers (although they still sound naff). Handles games quite nicely too.... although I'd not really know that, seeing as though it's my work machine and not intended for games. Just hope the boss doesn't read these forums
I have yet to see a better laptop screen than my sister's Sony Vaio - for watching films, it's truly incredible.