I currently have a Sigma 530 DG ST, and have been very happy with it for the money.
I'd like to start shooting with at least one flash off camera. I'd also like to retain TTL capability.
What is the best option? A 580EX and a 430EX? Does an ST-E2 and a couple of 430's make sense, or would I be better off just getting the 580EX instead, and not getting the ST-E2.
I'm not a pro shooter yet, so I'd like to keep cost down as much as possible. I'm also open to 3rd party triggers, although I do think keeping TTL would make my life a lot easier.
Any suggestions for a 2 flash off camera setup?

