I've been asked to do the events photography. I realised that I will need to get a flash for my Canon 450D digital camera.

Would 580exII is good to go in a long term? If so, do you know any good bargains to purchase from (in australia)?

I also thinking of getting the trigger thingy where you can take off the flash and still use it while taking photos. But I would to know if its worth it, or its not much difference?

Thanks