Definitely leaning towards graphite black as the accent color, but shying away from FDE and the desert family of colors... Maybe that brown DD is using... Or tungsten and od green?
Don't go with OD.. you'll hate yourself if you do. Blue tungsten would look good as would burnt bronze. Sniper gray (looks more blue than gray) might be okay. I painted a S&W 1500 in coyote tan and it tured out great but I understand wanting something different.