I've had some experiences with firemouths recently. I had one for a while that was an absolute killer -- was systematically removing the eyes of its tank-mates. I now have a less aggressive one that flares at my silver dollars, but seems ok with them.
So, I guess you could go to your LFS and pick the tamest one they have ... might work out, but I think you might eventually have some issues.
So, I guess you could go to your LFS and pick the tamest one they have ... might work out, but I think you might eventually have some issues.