hmmmm nice topic.... i can't choose just one
Jimmy Page - heartbreaker(insanely high speed...)
SRV - Little Wing (so very smooth)
Steely Dan - Rikki Don't Lose That Number
Mark Knopfler - sultans of swing (very long lol)
alot of stuff by kirk hammet (metallica) - bleeding me (for one)
Randy Rhodes (ozzy) - mr crowley... even better on the " A tribute To Randy Rhoades"
Trey Anastasio - Divided sky
Pink Floyd - Comfortably numb
Journey - whos crying now
jimi hendrix should be mentioned of course....
the list goes on and on and on