IMHO, I suggest going with Threads v7 and that way you avoid taking up a ton of space. With UBB classic you end up using file space as you create forums, post, new users join, etc. Eventually you will kill your file space and have to upgrade but with MySQL it consolidates posts, forums, etc into tables that the files access which takes up less space. You can have a MySQL database with 5GB of data which would translate to probably about 10GB of file space so you would get the better end of the stick going with Threads v7.
Also Threads v7 is more secure as passwords are stored unencrypted on classic in a perl file that can easily be accessed if a hacker manages to hack your site.
Last edited by Steve M; 01/04/2013 11:55 PM.