Speedlight SB-700 vs SB-900
I believe the SB-700 even is weaker than the older SB-600.
I would love to have SB-900, but at $500 each, crazy pricey. I just broke my SB-600. Now, just have SB-800 left to use. Need to get a replacement, waiting for SB-900 to go on sale to pick up a couple (2 or 3 will do nicely).
Coup that with the Pocket Wizard Flex TT5 and MiniTT1, awesome stuff!!