Mics are fine for getting close to the acoustic sound, but they bring so much extra baggage to the stage ... most sound systems are already a comprmise (good as they may be) to reproducing the fine acoustic qualities of a good guitar. It seems to me the best thing to do is use an electronic arrangement that works pretty well at capturing the good qualities of your guitar, and there are some very good choices now-a-days. In my estimation instrument mics are for studios, or maybe very well controlled stage environments. I don't typically have the luxury of very well controlled stage environments, so I use a a great electronic set-up for my guitar - it approximates the refined sound of my guitar, and is a well controllable signal. I am happy with that sound.