So I'm thinking of swapping from SMF to xenForo. So far it seems xnForo would be a great improvement for my site, but I need to find some form of helpdesk addon or one I could bridge into a xenForo setup. For example we use the free HelpDesk addon for SMF. I'm not really wanting to pay for the helpdesk software but I don't mind a small subscription or one off payment if it does the job well. Any ideas?