Hi John,
Much like "favorite" guitar brands and models, amp recommendations are entirely subjective. Budget is a tremendous equalizer, followed by feature requirements.
At the very least, an acoustic amp adds a tweeter and supports a wider spectrum of frequencies than most electric amps, so if you have a guitar that sounds good plugged in to an electric amp it will sound great through an acoustic amp.
I have a Bose L1 Model II (PA) for performance and, as compact as it is, it is still a lot to haul around for jamming and small get togethers. I really wanted more of a "practice amp", something that I could just plug into and play, at will. A little over a year ago, after reading every review I could find, I test drove (almost) everything available. Spoiled by the clarity I get through the Bose, I had set my sights pretty high. I found a couple of outstanding amps, but I didn't want to spend a grand (or two), so that narrowed the field considerably. More than any other feature, I wanted an amp that "got out of the way", that is, I didn't want to hear the amp - just the instrument. That eliminated most of the least expensive of the offerings out there, as they all added some "color" to the output.
I landed on an Ultrasound DS4. Ironically, it was the last amp I heard (I had demoed everything else, first). Of course, I am convinced I made a great choice, but I have won consolation prize after consolation prize each time others have heard this amp. Musicians (not just guitarists) love this thing. The most common comment after "Your guitar(s) sound so good!" is (paraphrased) "Your amp is so transparent!". That is what I was after, and that is what I got. Have a look (and happy hunting):
http://www.ultrasoundamps.com