I have a Canon Rebel XTi and plan to upgrade to the 5D Mark II as soon as I can. I've been researching wireless lighting and trying to figure out what I need to get started. I have a 430ex - trying to figure out if I should get pocket wizards - or if I got a 530ex and used it on camera, if I could use the 430ex as a slave? Then I'd have two lights - might be more economical. ??? I'm pretty overwhelmed but eager to learn.