In reply to Superchop75: I was in a similar situation to yourself a few years ago. I had G12s and climbed mainly III and a couple of IV's. I bought some G14's to see how mono's worked and found they helped on routes with a fair amount of ice and they were very good on bullet hard ice encountered in Morocco. They are a gas heavier than G12's.
I have not used the mono's on mixed as most of my winter stuff has been snow and ice but others will post to say they are helpful.
Having said that I have done my hardest technical climbing wearing G12's and they were fine.
Cheers Davey