No love for Alex Lifeson? Rush isn't known specifically for crazy guitar solos, but that guy puts out so much sound.
Petrucci was a blast to see live as well.
http://www.youtube.com/watch?v=0U3D-V7LoaQ
I went to this show a couple years ago and got to see Dweezil Zappa, John Petrucci and Steve Vai just jamming. Jordan Rudes came out with a keyboard guitar and jammed with them too.