Really? Trust me, all three are very tasteful musicians. Pure class all the way, especially with Vai. I don't think many here would like Mikael Akerfeldt as much being as they play a lot of heavier tunes, but anything off the "Damnation" album is amazing for those into easier listening.
Wahniedit: I think a lot of you here would enjoy Eric Johnson as well, especially you blues freaks. Same pedigree as Satch and Vai, but with a bluesier edge. Cliffs Of Dover is a classic and worth checking out. This guy has an insane ear for tone.
Tender Surrender - Steve Vai (Always been one of my favorites)
http://www.youtube.com/watch?v=f1VjwciFLAg
For The Love Of God - Steve Vai (The emotion in this song breathtaking)
http://www.youtube.com/watch?v=Loi-Lv7kuHk
Surfing With The Alien - Joe Satriani (A bit heavier, but its a classic)
http://www.youtube.com/watch?v=MjNAeELQ_Z8
Always With Me, Always With You - Joe Satriani (Joe can play soft and pretty too)
http://www.youtube.com/watch?v=dIfu2OCzHPo
Windowpane - Opeth (The first solo brings tears to my eyes. Its simple as most songs off of Damnation are, but it fits alsolutely beautiful. His vibrato is out of this world)
http://www.youtube.com/watch?v=0UxS6r49OlY