Last fall I bought the HJC 3/4 with full shield and drop in sun visor. I absolutely love it and now use it as my winter and longer travel helmet. I usually use a 1/2 helmet during warm weather. Here's a link to the HJC helmet.
HJC helmet As far as size I had a medium on my previous helmet and went with a medium on this helmet which was just a hair tighter but fit better. I tried on all the HJC and Scorpion models before buying. I would definitely try them on first.
