I have a choice between these two amps as I look forward to upgrading. I think these are my best choices for getting into "rehearsing to small indoor gigs" stage amp-wise. I've played through the Roland, which I found used at my local GC, and I like two things about it primarily: the built-in distortion, and the built-in chorus. On the other hand, I have played through other Acoustic amps and absolutely LOVE their sound. I think the B100 has a drive circuit as well. A few details: The Roland is selling for $300 currently; the Acoustic is available on MF for $250 as a restock and $300 for one in-stock now. I'd be competing sonically in a metal environment with one, possibly two other guitars, also playing through combo amps (don't know the exact wattage). I'd prefer an ability to mesh with effects, as I'll probably want to add pedals to the chain in time. Give your vote one way or the other, and feel free to explain why you voted the way you did.