Regarding the third member of G3 always slaughtering Satch and Vai, they were pretty f**kin safe when I saw them in Birmingham a few years back with Robert Fripp. Man oh man, that guy blows.
He didn't do a single damn thing all night that sounded like a guitar. Didn't even come onto the front of the stage, so that sat in my cheap seat, I couldn't see him.
Probably just as well, seeing him would have further encouraged the urge I had to throw the nearest heavy hard object at him, while screaming 'Just play a f**king powerchord for f**ks sake!!' If i wanted to listen to a synth player, I'd go see Fatboy Slim or some other 'DJ'.
As for Yngwie, technically awesome, but not really my thing. I like a good shredder as much as the next guy, but he's just a little too much. Not enough melody.