Just a thought for you to consider and/or toss overboard as you like. By going from a half to a full could be going a bridge too far. I've found the half helmets not quiet or protective enough and the full helmets too quiet, too claustrophobic, too heavy, too expensive. I find 3/4 helmets to be the best all around for me......rain or shine. I have a Nolan that has a removable chinbar and face shield that converts it to a full face helmet but it has been a hassle to fiddle with.....I like the 3/4 setup the best.......chinbar and face shield detached. In cold weather I have a Bell with a dropdown face shield. I just wrap a scarf around my nose and mouth if it gets really cold.
So, just something to consider.