Hey everyone, I just got the following unit for my Nikon D90. Only used it once, so I've barely scratched the surface of what it can do, but I already love it. My one question is..now that I have it, do you think/recommend that I should get something like this to go along with it? I'm not a pro, so I'm very new to flash units/etc in general. In case you don't know, I'm a amateur photographer for senior photos. (Mostly do outdoor shooting.) But for other things which may be inside, would this be good/necessary to have on hand? Thanks!