I was looking to get an flash for my Nikon N55. I did come across a Nikon SB 600 Flash for a decent price on Ebay. Any suggestions on any other flashes that would work well for my camera? If possible, any other brands like Canon, Quartrary, Nikor, Sony etc... as far as flashes go. Also, I was wondering about Zoom Lenses. I looked at a Nikon 70-300mm G-Lense that was at a good price brand new. Do you think that would be a good investment? - Nikon L.