I have Gold Iridium and VR28 for my Wisdoms. Gold definatly kicks ass for bright conditions but the VR28 is still a little dark for night sessions, late day runs, etc.
get HI blue for the flat light, get fire for the sunny days. its my setup and its perfect.best way to do it is try on diff ones look at a bright light then look in a shadowy spot where the light is bad.