In reply to partz:
Fit would be the first thing I would look at and if you're looking for a wire bail crampon Petzl fitted my phantom guides the best.
As you are in a fortunate position of already own a pair of G12s that you can use for Alpine stuff and easy snow plods, I would personally go for something a little more specialist instead of the one crampon for all situations. Although I own a pair of Lynx crampons and love them, I have only ever have them in a couple of set ups.
I would look at the Darts, Stingers and G20s and if you don't want to go the mono point the Dartwins or the G22s.
Please take this advice with a pinch of salt as I don't climb hard and have no real monopoint experience.
cheers
Gaz