Oh, definitely the Fly. Until the End of the World's is in the ballpark, and there are others as well, but The Fly is so stunning that it leaves everything else behind.
The Electric Co. is some excellent guitar work. Especially towards the end. End of the World is stunning Edge work also and, as short as it is, the solo bit in Kite speaks volumes.
Aside from those three, the obvious ones are Bullet and the Fly.
Well last night I just suddenly posted this topic without much thought as I'd just been listening to Out Of Control.
I still stand by my word but yes all the songs you guys have listed are sensational too!!
The Fly is definately the most popular!!!
Another one that I love is the ending to Dancing Barefoot.
Is this the longest U2 Studio Guitar solo??