The Cleverer Speed Light Kit - Nissin's Air + Di700A - Tempted?
Nissin has just supplied a very good idea that will please Sony, Nikon, and Canon shooters:
Their new Di700A flash is packaged with a dedicated Air 1 wireless transmitter that does TTL as well as full manual control.
For dedicated speed-light users the two turning points are the TTL and the radio transmission mode. These make it possible to have a truly portable studio flash system that is not in a studio...for times when you are not in a studio.
The Nissin Di700A may seem to be fairly similar to medium-power flashes from other manufacturers - GN of 48-54 at ISO 100 for various focal lengths. The flash zooms for 24mm to 200mm coverage. It has full auto, TTL and manual setting.
The Air 1 command panel on the transmitter shows three groups that can be controlled and the ability to fire off -2 to +2 stops in any of them. If you employ three flashes as a main, fill, and hair light you can change them from the camera position very easily. And the fact that the signal is being borne by radio waves instead of IR pulses means you are going to be able to control more surely in bright conditions or in areas around corners.
I daresay you can also get the flash on its own, letting you build further on that strobist studio set.
Tempting? Nissin make some great flashes for DSLR and for the mirror-less systems as well. If this air idea goes ahead we might see the transmitters for those as well.