I think some people tend to look down on the Guitar Center's version of Acoustic, probably because of the price points being lower than alot of other so called high-end gear.
But I have to say that I was really impressed with the tone of the new Acoustic amps. I plugged into a B200 combo at GC a few weeks ago, and said "wow...nice tone!"
Note to the OP: I'm sure you are already aware of this. The head in the B200 combo amp is the same as the separate B200H head. The speaker in the B200 combo is 4 ohms, so it's allowing the 200 watt amp head to provide the full 200 watts for that combo amp. The separate B115 cab is 8 ohms. So when you plug the B115 cab into the B200H head, you will only be running the head at around 140 watts. Plugging in a second B115 (or using your Ampeg 2x10 8-ohm cab as the second cab) would provide you with the full 200 watts.