The lighting a capture are great. I do feel though it is a little oversharpened - some jaggies around his arms. I think it could have been fixed especially with advanced editing with the blur tool.
i love these live music shots!
the "pose" and colors are perfect, the only thing i'd like to criticise, is the crop on the right of the guitar and his finger.
anyway, a 7
if you had moved slightly to the right, you could have backlit this guy w/ the large light, as it is now, it kind of distracts. very good sharpness though.