Well, Nikon's CLS system is really starting to annoy me, and with my newly acquired 80-200mm, its nearly impossible to get my Sb-600 to flash from that far away using the CLS so I'm looking for some sort of wireless transmitter/receiver. I'm currently using my camera as the commander. I was thinking of getting an SU-800, however that's a little too pricey for me so I'm looking for a cheaper alternative. Anyone have any suggestions? Thanks.