The guitars themselves are also a huge factor. In my experience about 7/10 acoustic guitars actively fight against you when trying to record them. In other words they exhibit traits in the sound which you find become undesirably obvious as you go in search of the traits that you do want to hear. The design of the instrument, type of wood and age are all factors. Generally speaking you do not want a resonant, vibrant guitar with lots of projection and extended highs and lows, but rather a dry, middly, tight sound without too much high frequency.
I'll have a listen when I can and see if there's anything to suggest.