Hmm, I've got one of those, which I wisely picked up at a jumble sale for $5. I'm not currently using it - I can live without the largely pointless "Windows" keys, but not the volume wheel on my current keyboard - though I'll probably attach it to something else.
I've got a similar one, which I just happened to keep over the past ten years (why are you looking at me like that?). However, I <em>like</em> having the Windows key here, because -- although it's the only use I have for it -- I really like being able to hit "Windows + M" to minimise all. Oh, dragging that cursor all the way down to the quick launch bar for the "minimise all" button is <em>such</em> a chore, isn't it?
the classic one for me was our original IBM PC keyboard. You know, 85 keys or whatever it was. no F11 or F12, etc. you could've killed a small animal with it, it was pretty weighty. I've never used anything like it, since. Even that "Classic 101" model you link to seems a bit too plasticky compared to this one...