I don't know.
But here is a list of 10 favorite guitar instrumentals:http://www.aolradioblog.com/2009/08/21/ ... rumentals/
If I remember right Steve has also said he likes the orchestral concert composition
named "The Rite of Spring" by Igor Stravinsky.
And I remeber Steve was excited about his meeting with the
well known american composer Elliott Carter.
I don't know but again I maybe can see some Zappa - Vai parallels/similarities.
I read Frank Zappa got to known and meet the Norwegian modern classical music composer
Arne Nordheim. It can be very interesting with this "stange/odd" modern music.
I really like this composition "Partita fur Paul" by Arne Nordheim.
Also the performance is excellent I think:http://www.youtube.com/watch?v=T1YUu60dMNo
Music is a real beauty.