I have both transformers (16b-3 and 16b-6) for my build and am planning to do a comparison. That said, I'm super glad to hear that the 16b-3 does the job well! I figured it would, but SO many people said "no way man! It won't play as good," so I managed to source a 6 as well.
I've thought about starting my own thread, but not sure if it's needed with how awesome of a job djblouw did here