The best acoustic guitar recordings??

Jorma Kaukonen: "Too Hot to Handle"

Doc & Merle Watson - Pickin' The Blues

Gilberto Gil Acoustic. That's the best.

Awesome sounding solo guitar lp.

To add to many great recomendations above:

Erik Mongraine, Solo player mostly, exceptionally gifted technically, two albums, Fates and Equilibrium, both are wonderful.
http://www.youtube.com/watch?v=4iRw0uKamN4

Andy McKee, solo and with Don Ross, gits, the pair of em..
http://www.youtube.com/watch?v=ExgqnilG4pU
http://www.youtube.com/watch?v=4pbSvsIVTwQ

If it's blues then Mississippi John Hurt or Robert Johnson, both Legends of the 6 string..

This is different, but should be checked out, quite brilliant - Juan Carmona: Sinfonia Flamenca. On You Tube here: http://www.youtube.com/watch?v=UfyvcN_oSQw

Kenny Burrell, Midnight Blue, great Jazz guitar, he played with the greats and is a gem..