Not to sound harsh, but you should be able to get a decent capture of an acoustic guitar with just a cell phone, so if your guitar sounds good and your recording chain is better quality than a phone(which you haven't described), you just haven't done the work yet.
Some guitars sound better capo'd, some don't. Without a gear list and sound example the only advice i would give is to put on some good headphones, put the mic at guitar level when you stand with it strapped on and move in out and around while to learn the tones you can get. I will say that some mics are extremely poor at getting a decent sound with AG and some guitars can be more problematic than others but you should be able to get a good enough recording that a bit of eq will get you the rest of the way.
I have found that even an sm57 can give a good sound if placed correctly for the arrangement- anywhere from two inches from the fretboard to eight inches from the body depending on the timbre you are chasing. Some will even put it over the guitar and/or over their shoulder aimed down at the guitar. So: move the mic til you get the timbre you are wanting