I need to set up an online community for a business that I am starting. I am trying to decide what board I should use...

I have narrowed it down to

Yabb cause it's supposed to be lightwieght, easy to install and fairly configurable.

PHPBB cause I liked the stock skins especially the one that looks just like a VBulletin board

Invisionboard Cause jamble seems to think it's good and I kinda consider him to be "FK's Message Board Afficianado"

any advice? I need easy to install, can be cgi or php / mysql. I need fast, configurable and skinnable.

please tell me what to use and why.