I'll go out on a limb (I can hear the jeers already!) and say that the little Behringer AT108 is a decent, simple, low cost, good sounding amp for the use you describe.
In my living room this year ThinCrust and I were playing around with the new Baranik, and plugged in the AT108 just to check out the guitar's (Highlander) pickup. And it sounded very good.
Using the "Bob Taylor" method of gradually increasing the volume from zero (all guitar) to high enough that "all amp" was what you heard, we listened for changes in tone, and found the sound reproduction very good.
I have a ZT Lunchbox Acoustic coming, and have my Rivera Sedona Lite, so I'll have the price ranges covered from $100 to $400 to $1400, and will be A/B/Cing them at my Oklahoma AGF Gathering. I'll give - or ask one of the other AGFrs to give - a report on what we hear.
But even now I wouldn't be hesitant to recommend the AT108 if a good sounding lower priced amp (that is also very light and easy to move around!) is something of interest.
Best,
Phil
Links to AT108 online merchants:
http://www.amazon.com/Behringer-AT10...7704062&sr=8-1
http://guitars.musiciansfriend.com/p...FQO87QodMXLqGQ