Hi guys, been looking up on flashes recently. It's going to be my first flash. I must say the RT system seems damn fine and attractive, but 600EX and ST-E3-RT is commanding a high price. So the question is this: what is recommended as a good replacement? I've looked at YN-E3-RT and have waited months for the YN-600EX (which to my dismay may not be an exact replacement for Canon 600EX). Pocket Wizards seem awfully expensive. Is there any recommendation of a good 3rd party flash and transmitter to get? 580EX II doesn't seem too attractive for now. Also, I would like to do off flash ETTL. Thanks.