It would probably be helpful to know what kind of music you like. Acoustic music can run a pretty wide gammut.
At the risk of suggesting music that might not appeal to you, here are some albums that are very well recorded and have great music if you are open to it:
[size=small]Norman Blake - Whiskey Before Breakfast[/size]
Blake is an acoustic guitar virtuoso and his down home bluegrass style is
very easy on the ears. I have it on vinyl but it is available on CD.
[size=small]Allison Krauss & Union Station - So Long So Wrong[/size]
While her live album gets a lot of attention this recording actually has a
slightly better and more consistent lineup of songs, and it was produced
in a recording studio so the sound quality is better to boot. I have
the 180g vinyl LP Mobile Fidelity 2 LP set, but again this out on CD.
[size=small]John Fahey - The Transfiguration of Blind Joe Death[/size]
John Fahey wasn't folk music. He wasn't bluegrass. And he wasn't blues.
But there are hints of each of these genres to be found throughout his
music. He best described his brand of music as "American Primitive," which
I think fits pretty well. Very beautifuly played using a three-finger picking
style that he helped to pioneer, there are also a few tracks playing slide
guitar as well. Essential listening for anyone who likes acoustic guitar.
--Jerome