Bamboo has been working fine and has the advantage that it is maintained as part of the hosted jira studio so that keeps my (or whoever sets it up) workload less and there is no additional hosting to deal with. So I'm going to stick with that for now.
However, I think I can configure bamboo to test pull requests which has been on my list to look at but I don't think there is an issue for that yet. I'll update your issue to be about that. If there is significant functionality missing using bamboo, then I'll look more closely at travis-ci.
Nathan