Another thing is, A wise man name "Satch" once said something along the lines of, "Tone is in the hands, everything else just helps". Which means, even if your playing through, let's say, tony iommis exact setup, and you cant play well, you will still sound like crap. Gear doesn't play as much of a part as your playing ability. I bet if yngwie or steve vai played on a 100 guitar through a 150 dollar amp they would still sound freakin' awesome and have that "signature sound".
I am Comfortably Numb... :D
Oh yeah...STICK IT TO THE MAN!