Looking for an acoustic guitar recording..

For outstanding finger-style guitar playing, with a bit of celtic, blues and jazz flavoring, any of Martin Simpson's recordings are highly recommended, particularly:
"Live"
"Leaves of Life"
"When I was on Horseback"
.

You might also try Dave Matthews and Tim Reynolds - Live at Luther College. It's very upbeat, and VERY well recorded! It has some vocal tracks, but also has some stunning guitar-only tracks. I like track 2 on Disc 2, called "Stream;" there's some blazingly fast picking by Tim Reynolds on it that's guaranteed to impress. Enjoy!

Keb Mo -- Keb Mo

Muddy Waters -- Folk Singer

Both are well recorded acoustic country [Delta] blues. Folk Singer was recorded 40 years ago, Keb Mo more recently.

Leo Kottke -- 6 & 12 String Guitar

Finger picking, slide, open tuning, all guitar -- no vocals.