Price is always an issue, but frankly, we need it. Complaints pile up, and I only have time to operate the forum - not write one. That's pretty much what SMF expects you to do these days if you want all the goodies. Our community isn't on the level of a professional developer, but we've certainly outgrown the free stuff. It's a tough spot to be in, but them's the rocks and something has to be done.
I did some more homework and one solution has really got my attention - even more than vanilla:
xenforo forum, and hosting it on KnownHost. Xenforo is very pricey (it's 140USD out of the box, and another 50USD for the Resource Manager). KnownHost is 25USD a month for their base plan.
The benefits though would be enormous. Their Resource Manager is outstanding. None of the bloated up and unsupported Tiny portal crap we have to deal with here. It's a simple plug in integrated right into the forum that was actually developed by the main staff. Social networks are integrated. Post searching, lists, and so on. They also have migration services. Even if we couldn't directly migrate, our old posts could be imported over time since the move would be voluntary.
I'm thinking to offset the cost I'd set up a donation box like Lavalit used to have. It would be entirely voluntary - no incentives or any of that.