I'm so confused on which Nodal Ninja to get? With the D300 and a sigma 10-20mm (also have nikon vr 18-200mm backup) will their be any limitations if I use the N3 or should I just go the extra money and go to the N5. I like the n3 better because of price and size but I don't want to make a mistake and purchase the wrong Nodal Ninja Help me sort this out please....

Thanks
Mooney101