That seems good although I havn't tried it. You also have the option for www.phpbbforfree.com which uses the PHPBB forum software. I've used it and it seems easy to get going.
vBulletin is very good (as you can see) but its expensive. Its very customisable though, and i like the layout. Not too into phpbb since you cant see the last reply posted.
the best most versitile I've found that doesn't take much knowledge is Forumotion.com
It's free and very easy to use. (I've tried like all of them, I'm a forum freak)
I've tried invisionfree but found it more confusing than Forumotion.
That's just my personal opinion though.