Great post, thanks!

I have the Sidewinder and I generally like it but it is not "perfect for me"

Pros:
W key has 'bumps' so you can easily feel it.
6 game keys, even keys (2,4,6) have bumps also.
Num pad on left is cool
Macro'ing is very straight forward and easy to set up and/or change.
Ability to disable keys (caps lock - no more!)

Cons:
Very flat, I like to elevate my keyboard on the little legs, SW does not have this. They way I sit, if my hands get out of place from moving around it is harder to get them back in the right spot.
Keys are very flat, almost lpatop like in their profile, I don't care for that personally.
I am a WSAD'er. I can get to the 1-6 OK. hitting the num pad is harder for me.
It advertises more macro keys then it has because the column of 6 has a switch so you can assign 2 macros to the keys but have access to only one or the other based on the toggle.
The light for the toggle is at the bottom, hidden by my hands/wrists. So I have to lift my hand to check the state, it would be better on top of the column.
Would like to be able to assign other functions to disabled keys (i.e. make caps lock a macro or another modifier)

Over all it a decent keyboard. I really would like to try out an original G15 with the 18 G-Keys though, it seems like it would be perfect for me.