This thread still generating interest, cool!
I personally have found all amps "wanting" and have realized the best sounding solution for acoustic guitar is a PA. But in this day of killer electronic advancements and uber affordability, there are great options available that range from the pro gigger to the casual performer, to the player who simply wants to have fun and plug in on occasion. Here is where I think the column systems flat-out annihilate the conventional guit amp. Sure the acoustic amp market has gotten lots better, but the "array" systems with built-in sub and flat response just sonically outshine them all, and by no small margin, IMHO.
Bose, to be sure, but look also into the Turbosound Inspire, the JBL EONs, and the like. Amazing user reviews for the simplest reason: they sound beautiful ...uncolored, crisp, and full tone. Period. Guitar and voice never sounded this good in an amp to my ears. Since folks are asking, I'm just tossin this in.
Edward