Hang on, Gibbo?! I know him from 911uk, met him at a dyno event one time! Cracking guy, he had the 997.1 with the powerkit that wasn't the full powerkit, best sounding gen1 car I ever heard.
Very surprised he only rated his own car at 7/10 and the Mustang at 8/10 for sound, that seems way off to me. Lovely guy though, tell him I said hi.