Winged Fantasy said:
I say keep phpBB3, but if you want to change go to vBulletin, but you realise it costs.
Of course it costs, however, the question remains, is it worth the cost.
Some features that would be implemented would be an arcade system, with over 1500 games which are scored and you can earn cash by playing and winning.
Lottery and bank system, so you can bank your points and make money with interest, and you can setup a lottery system so you can buy tickets and have the chance to win X amount of cash (fake) or even something like a free domain.
It is also safer, think of PHPBB's security like a wooden fence. vBulletins security is like a concrete wall with laser guns and rocket launchers on the top.
Security patches for vBulletin are issued within days and sometimes hours upon receiving the issue.
The possibilities are endless with vBulletin. With vBulletin, you don't have to update the styles when you install MODs, IPB you do for the most part. It is all done automagically.
I've said it once and I will say it again, vBulletin is the way to go.