[MarkFL]

Originally Posted by In Omnibus

...So, again, it reverts to what you want to do with your forums. Are there add ons you actually need to operate your forums? Or are they less functional and more bells and whistles?

Give us some idea of what's important to your forums and we can give you a better idea of which version best suits your needs.

I would say pretty much the same thing. It really depends on what your needs are.

The main site with which I am involved is a math help forum. We wanted to be able to provide an array of mathematics oriented tools to our users, such as tools for constructing/previewing LaTeX, the ability to embed TikZ code, live Desmos graphing calculators, and so it made no sense for us to upgrade to vB 5.x

If your community is going to be highly specialized in some area, and you think you are going to need a good deal of custom coding, then vB 4.2.5 would likely be your best choice. However, if your needs would all be met with the functionality of vB 5, then that would probably be the route you would want to take.

So, if you could give us some idea what you have in mind for your communbity, we can offer better guidance.