I never liked phasey, chorusy sounding guitars. So, Satriani's tone is my choice. His sound/tone is too, ummm, contrived? IMHO, I feel that the tone of his is a failed attempt to be original and good at the same time. It is original, yes AFAIK, but it failed miserably. I'm a fan of GUITAR>OD (sometimes with WAH)>AMP set up.
@ ROB/ROLEXM
Kung 'di ito yung hiyaw, ito yung phasey, chorusy tone.