I'm looking for a new forum software. My 'candidates' are ipBoard, wbb4 and xenForo. Presently I'm using Kunena on Joomla for a rather big forum (10.000 users, 0,75 million posts).
Before investing money, however, I'd like to do a few tests on my own server, take a look at the database / source to get a feeling on how much work it will be to migrate the old forum to xenforo. But I can't find any downloadable beta.
Is there any available for potential customers?