I've been very picky about keyboards over the years, as I tend to type like a machine gun. Several years ago, I found one that I thought was perfect: the NMB RT6856 which used to be bundled with Micron desktops. I actually possess 6 of those.
Well, I figured it was time for me to get out of the stone age of PC keyboards and try something new. So I picked up a Saitek Gamer's Keyboard. This thing is slick! A dedicated macro pad, an ultra-quiet key throw (so long, 'machine gun'), and groovy blue LCD backlighting.
And its just plain cool-looking too:
No keyboard I've ever used has compared to MS's new wireless Natural keyboard. Got one for work, since I can't type on a non-split non-ergonomic keyboard, and it's far and away the best keyboard I've ever used. Quiet, responsive, and I can put it in my lap and kick my feet up on the desk.