I'm a student and a rather budget oriented one. I have a Canon 550D/T2i. I have a Sigma 17-50mm f2.8. I want a flash unit that can be on camera or off camera (portable). My budget is about $200 right now. (A little flexibility) I'm interested in dance photography (look up lindy hop), portraits, still life, and a few other things. Most of the stuff I would do would never be in a studio environment even though I would like to try that eventually. (No space and no money)
I'm thinking there's at least a couple options that I have:
A used $200 canon 430EX II or a new Yongnuo YN-560 II for $72ish. What would I lose by getting the Yongnuo over the canon? I would gain quite a bit of dough by buying the Yongnuo instead. Enough to actually buy some/a cheap light modifiers and maybe cheap radio triggers for sync/fire.
Ideas?

I think that's a good option. I don't know if HSS is really going to do anything for me. I could borrow someones canon 580/430 when I get a chance and try HSS, but I think it will not give me the effect I'd like. I'm just thinking it will kill off all ambient light and I don't want that. It would be nice for some types of photography and possibly for some outdoors shots, but ... eh? We'll see. If all else fails, I have a cheap flash unit to use as a second light when I buy a Canon 430EX II or, god forbid, a 580EX II.
