Very good point. Incidentally, I began in a fed that allowed head lift and lifted that way for a few years. When I wanted to do a USAPL meet I had to teach myself not to (I even red-lighted my first lift just out of bad habit). I learned that for me, I seem to be able to maintain my arch and my tightness better keeping my head still. So, that's how I bench now in any fed.
Just my two cents.
Oh yeah, the original question: I don't really "see" anything, but my head is pretty straight up. I set up with my eyes slightly lower on the bench than the bar, and look straight up. Since I'm arched, with my shoulders planted into the bench, I end up in very slight flexion (my chin slightly tucked).