Fishman Loudbox Artist Vs Performer. Well, i did a comparison of the two (aer + fishman) about 18 months ago and to my ear the aer was and is a clear winner. I don't use an acoustic amp that much so i'm not thinking of replacing my fender, but perhaps just for size alone (under my desk) i might replace it.
I've not played an acoustasonic, but have gigged quite a few times with my loudbox performer. It also has two identical Each of the two models packs considerable power.
So i went out and got the fishman artist new.
One minor issue is that the phantom power is only 24v not 48v. However, the artist, besides the extra power, had the xlrs for both channels rather than just one and was the same price as the loudbox 100 [actually about $50 cheaper than where i got mine]. But i agree the performer has more oomph and in your case is probably the better choice. I've not played an acoustasonic, but have gigged quite a few times with my loudbox performer.