Sony Vaios are really the only thing that comes close for me. I have both the MBP and the MB, and have to say I much prefer the look and finish of the MBP. Alot less easy to scratch and the speakers really make it look the part. Its very rare that you see large speakers like that, and it makes it look unconventional. Also the thickness is one of the main points. Its so dam thin compared to other laptops out there, and most laptops are just square lumps of plastic, the MB/P really curves.
Having said that, I really like the look of the Alien laptops, but they look more cool then sexy
.