Not many full face helmets restrict vision if you have a proper fitting helmet. I use a z1. It fits me well. It may or may not fit you. just depends on what is comfortable for you. Having a full face helmet saved me from testing my aad after a mid-air collision. the collision actually bent my visor and I had to replace it. I could only imagine what could have happened if I was wearing an open face. I was knocked senseless for a couple seconds but was able to reach back and pull.
So yes go full face, but make sure you get a proper fit. Remember more expensive helmets don't mean more protection/quality. iv seen a bonehead composite helmet crack after someone hit the runway on a night jump (no flare).
talk to a rigger, aff/tandem instructors, your dzo, and try on others helmets if you can (if your unable to make it to a boogie soon) and ask questions. if you can get into a cutaway harness with the helmet your thinking of buying to get the feel of it. like I said before the helmet should not restrict your vision if fitted properly.