Nikon SD-9 Best Bet ??

Hello,

I am looking for a power source for my D700 and D300. I have both the SB800 and SB900 flas units. I understand the SD-9 only works with the SB900.

I am looking for a unit that provides very fast recycle times and is portable... Is the SD-9 the best bet for me, or are there others that are faster/better?

Thanks for your input. Regards, Lance
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http://www.lancekinney.com