I'd like to experiment with an off-camera flash but I'm reluctant to spend £200+ on something like a Canon 430EX II. Can anyone recommend any 3rd party manufacturer flashguns that have similar features for less cash? Ideally I'd want to spend no more than about £100 and I need it to be able to fire wirelessly using my Canon 650D. And if it had a swiveling head that would also be good. Oh and hopefully it would be quite easy to use! I don't ask for much, do I?