I second the Fahey suggestion for acoustic guitar. In addition, try Leo Kottke. His "Six & Twelve String Guitar" is a classic. Other favorites of mine include Ry Cooder (a true ethnomusicologist with great acoustic and electric work), Tony Rice, and Doc Watson. In the rustic acoustic blues vein, check out Mississippi John Hurt. For classical, widely recognized virtuosos include John Williams, Julian Bream, Andres Segovia and Christopher Parkening.
Many subtly varied kinds of music fall under the rubric of flamenco, which is a style of singing, dancing, and even living, as well as playing the guitar. This collection presents a good guitar selection, highlighted by the polished technique of Sabicas, the profundity of Manolo de Huelva, and the sheer brilliance of Melchor de Marchena. There is a drastic change of atmosphere in the transition from track 10 (a zapateado played by Nino Ricardo) to track 11: Manolo de Huelva accompanying the voice of Manuel Vallejo. Suddenly we are in a cuadro, the natural environment of flamenco, with a group of participants clapping, stamping their feet, and shouting encouragement to the musicians. No longer is it just a man sitting alone on a stage or in a studio, playing the guitar fluently and flawlessly; this is cante hondo, the heart of flamenco, intense and astringent, and the best of this disc's many flavors. --Joe McLellan"
David Russell was born in Glasgow, Scotland, but his family moved to Spain while he was still a young boy so he could study music in the birthplace of classical guitar. On Reflections of Spain, Russell plays the music of his childhood home with all the joy you would expect from someone revisiting a beloved place. Russell's formidable technique is powered by a keen intelligence and tempered by an emotional delivery. He plays chestnuts like Tarrega's "Recuerdos de la Alhambra" and Albeinez's "Austurias" with a fond intimacy that rescues them from cliché. Perhaps the finest moments on the CD are Russell's guitar arrangements of four of Granados's compositions. Although Granados wrote pieces like "Danza Melancolia" and "Andaluza" for piano, Russell's thoughtful versions remind us that the folk dances that inspired them were originally accompanied by the guitar. David Russell is one the finest classical guitarists to emerge in recent years, and his playing on Reflections of Spain is a near perfect wedding of technique and temperament. --Michael Simmons"
I have the two above CDs, and I want this one, which I haven't gotten yet :