am going to add to my flash arsenal, but have a question.

What are opinions on getting a SB-900 or an SB-600 and SU-800 remote?

I currently have 1 SB-600 but want to start doing more remote light placement but cannot figure what the best option is. Whether it would be to have a remote and 2 sb-600's or a sb-600 and a sb-900.


This is in nikon forum also but i couldn't figure which was the best place to put it.