I have a cheap hjc full face helmet but gets way too hot racing dirt bikes as I was younger, I think I have discovered the benefits of a full face myself haha!A bunch of Shoei's (full face and flip up) plus a Schubreth.
Not to belittle your choice in an open face helmet as I used to wear one a long time ago until I met a guy missing half his jaw from a mc crash. As he explained......what's the first thing you will hit if you (heaven forbid) crash? your face. By the grind marks on my first Schubreth after Bambi took me and my FJR down I suspect my face would be missing parts if I hadn't been wearing a full face lid.