This is a huge category and you already have some terrific suggestions. In no particular order, here are some of my favorite acoustic guitar artists that will inspire and sound great on your system:
Jorma
Michael Hedges
Antoine Dufour
Tommy Emmanuel
Bruce Cockburn
Luka Bloom
Adrian Legg
Leo Kottke
Harry Manx
Each of these artists has their own distinctive style ranging from fingerpicking pyrotechnics to old fashioned ballads. I had the pleasure of seeing Michael Hedges when he was alive. To this day, watching him play "Low Spark of High-Heeled Boys" on the acoustic guitar was one of the best concert experiences I have had. Harry Manx is special because he plays a moganvita (sp?) which is an Indian instrument that crosses a traditional 6 string guitar over a 32 string sitar. The result is a very full wall of sound and a pain in the rear to tune. I recommend "Road Ragas". Of course, in the Winter, I still enjoy putting on old acoustic Neil Young and the Grateful Dead while sitting in front of the fireplace reading and sipping bourbon.
Jorma
Michael Hedges
Antoine Dufour
Tommy Emmanuel
Bruce Cockburn
Luka Bloom
Adrian Legg
Leo Kottke
Harry Manx
Each of these artists has their own distinctive style ranging from fingerpicking pyrotechnics to old fashioned ballads. I had the pleasure of seeing Michael Hedges when he was alive. To this day, watching him play "Low Spark of High-Heeled Boys" on the acoustic guitar was one of the best concert experiences I have had. Harry Manx is special because he plays a moganvita (sp?) which is an Indian instrument that crosses a traditional 6 string guitar over a 32 string sitar. The result is a very full wall of sound and a pain in the rear to tune. I recommend "Road Ragas". Of course, in the Winter, I still enjoy putting on old acoustic Neil Young and the Grateful Dead while sitting in front of the fireplace reading and sipping bourbon.