I heard Nuno's "play with me" for the first time tonight on youtube believe it or not. I was impressed. I'm looking for more songs like that where they take classical themes and play variations on it.
You've never heard of neo-classical shred? Wow. To name a few guitarists who implement classical music styles into their playing:

Yngwie Malmsteen
early Paul Gilbert
Jason Becker
Joe Stump
Vinnie Moore
Tony MacAlpine
Randy Rhoads
Michael Angelo Batio

...to name a few
" When the power of love overcomes the love of power, the world will know peace."-Jimi Hendrix