On 11/5/2011 12:56 PM, Zane H. Healy wrote:
  I wish I had a good idea. I'm typing this on an
Apple Extended II ADB
 keyboard plugged into a USB-to-ADB converter so I can use it on my Mac
 Pro. On the PC I tend to use a no-name keyboard I got 20 years ago, but
 really like the SGI PS/2 keyboard that came with my O2. I really wish
 someone would make a good replica of the Apple keyboard, but as a USB
 keyboard. In part because I love the shelf behind the function keys.
 This is also why I like the IBM Model M keyboards.
 I seem to remember someone is making a keyboard like you're looking for,
 but it isn't cheap.
 
Don't forget 
http://www.clickykeyboards.com/ for more model M's.