RE: Opinions Please
I like to keep my brace height close to the lowest point where bad arrow flight and shooting noise goes away. If your arrows fly clean and true at 7" with little noise and the bow 'feels right' to you, then I would drop down to 7".
Keeping the brace height at the lowest point where everything works right gives you a tad more power stroke on the shot, which gives a fraction more speed and energy to the arrow. It's not much at all, but every little bit helps, IMO.