What pickup/mic is Michael using in the Martin when you play plugged in? Sounds great!
I just updated my pickup system on my guitar, and I've been really happy with it. The pickup is the K&K Trinity System, which is a dual source (mic+transducer) combo, that I eq using a Grace Designs FeLix. The FeLix allows me to eq each channel independently and to decide what blend I want of the two channels. The K&K pickup pairs well with K&K DI box options, I just decided to go whole hog with the FeLix - it's a box I've been coveting for some time. :)
Hope that helps. Feel free to ask any follow up questions you need.