I've seen a few of the older guys in the past years, as well as Slash, Zakk, Petrucci, Abasi, The Cult, Metallica... I put my time into hard rock and metal when I was younger. I always thought Larry Carlton had the tone of the gods, and he does, it's perfect. But the best tone I ever heard? The one that blew me away and made me want to buy all the same gear? Robin Trower. Absolutely perfect. I still haven't bought a RTO and JCM, but it's certainly on my list. His use of the wah pedal in conjunction with taming his crunchy feedback, pulsing perfect aural goodness.