To be fair, I've found this to be the most helpful all-round site.
The best techies hang out here, and they seem to be willing to go out of their way to help you.
I second to this!
AmigaWorld is good too but more A1/OS4 oriented, as you already said.
About the other forum, i'm not so sure. I was forced to leave from there when i realized that my threads were ignored by everybody, for a reason still unknown to me.
There is also lemon Amiga, but it is focused mainly on retro/emulation.
