My Alienware Area-51 7700 is over 3 years old now, and besides the VGA web cam in its lid not working and problematic RealTec audio, it runs Vista Ultimate quite well - Aero, et al.
I will replace it with another obscenely expensive laptop this year, here's my current favorite, a quad-core, -- and look -- it comes without any OS loaded!
It's cheaper and better than the new Alienware offerings, but the form factor is the same as my current one; a lunch-box.
I can't recommend a downstream laptop since I'd not be happy with one. My 3 year old runs great today... I invested heavily and am getting an excellent return for it. My chiropractor likes my 38 pound laptop too, but I have to buy two seats on an airplane to open it. j/k...
