x3 on Leo Kottke, only my favorite is "My Feet Are Smiling".
While this is not solo acoustic guitar, I can highly -- HIGHLY -- recommend the Jerry Douglas (Dobro guitar)/Russ Barenberg (6 string)/Edgar Meyer (upright bass) album "
Skip, Hop, & Wobble". Yeah I know the album name is dumb, but the music is just gorgeously melodic, and the playing is virtuosic when it needs to be and just beautiful throughout.
EDIT:
This is an example of the "New Acoustic" music that has roots in bluegrass, blues, jazz, Americana and classical music -- in varying proportions, depending on the artists.
EDIT:
Another "holy crap" album: "
Not Too Far From the Tree", an album of acoustic guitar duets by Bryan Sutton and most of the best bluegrass pickers in the world. Whew.
EDIT:
If you like jazz, you might want to know that the astonishing Frank Vignola has a
solo album in sort of a modernized gypsy-jazz vein. All played on a Selmer, so it's got "the sound". Joe Pass also recorded a whole SERIES of virtuosic, solo jazz guitar albums that are well worthwhile.