I love my Apple aluminum keyboard. The flat keys, short travel, and ample margins between the keys make it the easiest keyboard I've found to type on. Plus it is quiet. No loud clicking to distract me from the thoughts I'm typing.
Of course the annoying thing is that it's designed to work with Macs. Still, that doesn't stop me from plugging it in and using it with my Windows PC. The only real difference is the Command key sends a Windows key event. Personally, I use the SharpKeys utility to remap my keys so that the Command key on the keyboard sends Ctrl and vice-versa.
You can also get a narrower version without the number pad on the right. This gives you a bit more space to operate your mouse on the right without straining your arm way out to the side. (I keep my mouse on the left, so I don't have this issue.)
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