Ooh, cocky. Steve Vai-"Tender Surrender" then, better get to work.
I don`t really play much accostic, and I`m not very good, so I don`t know quite what to suggest. Zeppelin´s "Bron Yr-Aur Stomp" (sp?) seems difficult, but it`s fingerpicked so I can never play it. "Everlong" sounds good accoustic, but I´ve never got a hang of it/found a tab that seems right. I´m working on Pink Floyd`s "Wish You Were Here" right now, I like it very much but it´s not very hard.
whats wrong with stairway to heaven?
also you said you wanted a good acoustic song but maintain that you wanted something along the along the Satriani line? Im no fan but isn't he a tapper or shredder on the electric