Update, just incase someone else is in the same position.
Have been tinkering with IPB suite for a while now and here my thoughts and future plans.
Overall, I like IPB as a forum, it is functional with good admin/management tools. At times though, some of the feature seem overly complex.
HOWEVER, to use IPB as a total suite and the get the most out of it, does require the ability to make your own scripts which while I am sure many can, I cannot. Sure, you could "hire" someone to do that for you but the cost can spiral or try to use a mish mash of paid scripts which may/may not work.
So, the idea of using IPB as a complete package for the whole site, seems to be out the Window.
I am going to attempt to try using Wordpress as a front end with IPB for the forum. I may even try Xenforo in the future too.
Many knock Wordpress but as a basic front end, in my opinion, it is decent and has LOTS of community support.
One HUGE positive about IPB I have to say, is their official support are EXCELLENT. Quick to respond with accurate and helpful replies. User to user support on their forum is also good with some great community members but if you encounter any niche problem, you will find it more IPB seems to be more niche meaning user to user support can be difficult to find in anywhere other than their own forum.
I do agree that when looking at a forum, PHPBB while practical is showing its age.
I just need to see how much I can integrate IPB with Wordpress regarding user account etc.