its the full size g4 one that i use at work. i use an old lexmark spring key keyboard (as opposed to new, cheap rubber dome keyboards) and i like the fact that you really know that you have struck the key, instead of just getting a mushy downward motion and a soft sound. i've personally never met anyone who likes the mac keyboards (or the mice, for that matter) until now. well, to each their own, i guess.
good luck!
--jacob