I just bought a JDMB16A from Steve at HMotorsonline and he was cool. I actually was gonna swap to the more expensive B18C, but when I realized that it would be way more expensive than just the motor in order to make it smog legal, he actually down-sold me to my original engine which was actually cheaper. Since there are multiple versions of the engine and I said I didn't really care about extra performance, he down sold me again to the same HP engine rather than the slightly more powerful and expensive one. But he was also cool in recommending the right series engine for my car(del sol) since the one I originally had was a 1 series instead of a 5.
I don't know about the other place, but I would definitely recommend HMotorsonline. They get busy on the phones and we played phone tag a bit, but Steve was really cool in explaining everything and making sure I got the right motor I needed.