I have a 50th Anniv. hand-wired Heritage Series AC15 that I like very much. It's a somewhat different amp than the AC15C1, with a very cool EF86-based preamp in Channel 1, but I would guess that the "Top Boost" second channel is very similar to the brighter channel you mention. It doesn't have reverb, tremolo or a master volume, however, which the AC15C1 does. I love the clean tone of the amp with that classic Vox chime, but it gets awfully loud when I crank up for some crunch--pretty much have to run it through an attenuator in that case. The master volume in the AC15C1 should get around that limitation nicely.
Should do the praise band thing very nicely, unless you need a lot of clean volume--these amps are not noted for headroom!