Brazilian guitarist Naudo has a nice command of his instrument and a relaxed presentation. He plays acoustic guitar standards like Stairway to Heaven and House of the Rising Sun. He plays other popular tunes like Hotel California and While My Guitar Gently Weeps. I especially like his Santana covers: Samba Pa Ti, Black Magic Woman. There's lots more Naudo videos at YouTube, at Naudo's blog, and at Naudo's page on sevenload.
California Guitar Trio plays a quiet version of Bach's Toccata and Fugue in Dm. Here is another solo electric version by Sean Conklin. Finally here is a passionate acoustic electric treatment by Michael Fix.