So I have a Nikon D80 DSLR. I bought a SB-50 DX speedlight which I was told was compatible with the D80 only to find out that yes, it's compatible, but only as an external flash, no zoom, no TTL, nothing. Just another flash like I have in my camera. So now I am on the lookout for an SB-600 or more generic model that may be cheaper. Any suggestions from anyone? The SB-600 TTL function will work with the D80 correct? What are some good discount places to get equipment other than Hunt's, B&H, and adorama? Thanks guys!