Here's an incredibly swag photo coming off field. I4s seem to cover my face enough and I'm 6'1 and 200 pounds. Never been teased about having a tiny head either. Most people that say the i4 doesn't cover where trying them on their forehead. I4s sit very low on the forehead when worn properly making head wraps alot more useful.
I tried on eflex's and was blown away .... At how bad the forward vision was blocked by the nose and thermal lenses. I really wanted to buy a set that day but couldn't get over how bad it was. Everything else was great. I just prefer to see out of my masks.
A truly great mask is the grillz. Good field of view. Fits and breathes like a flex. Quick change lenses.