Crazy- off road tri sounds like a lot of fun. I often see ads for X-terra triathlons in North America. Let us know if you get into off roads, and how you like it.
Good luck with your sprints coming up this season! I like sprints for a lot of reasons, but mostly because of how much you can push yourself in each discipline. Its short so you can go a lot harder. But I warn you, after a while sprints just won't feed that tri appetite!