I probably should have asked here before placing my order but you live and learn...
I'm getting a D700 and want to do some 2 or 3 row panos to produce 24 - 50 Mega pixed equivalent images. I don't plan on using heavy wide angle zooms on the rig rather 35mm or 50mm Nikon primes - maybe 85mm max.
Based on the camera compatibility list I judged that the D300 was close enough to a D700 body and so ordered the NN3.
I'm now having second thoughts and fear that I may find I should have got the NN5 instead.