My turn.
I waited 1+ years for the C109 to come out. I was disappointed. It's a freakin' huge beast. I am a small guy, though, at 5' 8". My legs are just too short (inseam of about 29") to comfortably fit on the bike (not holding it up...just ON the bike).
The M109 fits me much better..but there's a lot on it I don't like as well. I'm "holding out" until something else comes along.
But...hey, if you want the C109, go get yourself a new ride! Just be careful, it is a whole different machine that that C50. Completely different class of bike.