Please excuse me if this should be in another forum, but here we go: I have a new Eden Metro Combo. It has a D.I. output in the back to go to a PA. I figured that I wouldn't have to use a D.I. box anymore, but our sound guy (who's opinion I respect) said that he still wanted me to go to the PA through a D.I. box. He stated that my amp DI would not sound as good as if I were to go directly to the PA through a DI box. Is he correct and if so why? If not, why?