I have the newer (multi-pattern) model of the M179 and get some decent sounds from it. First off, what is your mic placement? If I'm doing a single mic I usually mic at the 12th fret and slightly turn it in towards where the neck meets the body at about 18" back. This usually gets a good sound from my Martin. If you have two M177s check out these stereo placments - http://www.humbuckermusic.com/acguitrectec.html . Right now I'm using two SM81 mics into a DMP-3 Mic Pre. It delivers a beautiful, clear, crisp, and articulate sound. If you ever want to upgrade to a classic great mic you can find a pair of these for 350-400$. Another question, what interface are you going through? I hope this helps a bit.
Thanks,
Matt
