I host a small server for an online game. We've been utilizing a fairly old CMS called Enjin for our website for some time now. The entire concept works well for what we are using, and is used quite often for websites for minecraft servers, but having used vBulletin, IPBoards, Proboards, etc. in the past, we are finding the forum capabilities to be less than ideal and the concept that we are paying for this service on a monthly basis when we already have hosting capabilities seems silly.
After doing some extensive searching, it seems like there aren't many CMS options out there that can successfully integrate News/Blog style threads, a simple e-commerce shop, and a full functioning forum. I've looked at wordpress with bbpress/simplepress and have been underwhelmed at the forum capability without forking over $100/200 which at that point makes me think it would be better to fork over an extra $100 and go IPBoards/vB. We also quite like having a universal calendar integrated so we can plan events and users can see the events in their time zone.