I'm a beginner photographer and just recently bought my first DSLR, the D90. A lot of times, I am shooting indoors or somewhere where there is poor lighting and I am looking for a flash that could at least bounce off the ceiling so I could still get great photos without the "washed-out" look. I've read through a lot of posts, articles about these two flashes but still I am still torn between them because of the following reasons: The SB400 seems to be all that I need right now for what I currently shoot (family & school events) however... I am afraid that someday I would want/need the versatility and power that SB600 offers. I always want to further my creativity and with the SB600, I know I can do that. For family and casual events, I'm kinda hesitant to pull out a big, bulky flash lest people might think I am showing off or expect "pro" quality photos from me (which I cannot guarantee). The low key size of the SB400 is perfect for me, especially when I also don't have a big camera bag where I can put it in. I don't know, but I might come across a situation wherein I'll have to bounce the flash to the sides or to the back. I still don't know yet but I just might. Are these situations common? If I need to bounce off the ceiling in portrait mode, I guess I can just shoot in landscape and crop it (for the SB400). BUT... the off camera capabilities of the SB600 is what I'm really gonna miss if I get the SB400. Though, as I've mentioned, as a beginner, I still don't know YET in what cases I'm gonna be needing this feature. But I really do want to learn. Money is kind of a factor right now. There are some events coming up soon in which I'll be needing a good flash. The SB400, I can buy immediately for that. But it might take me another month or so to save up for the SB600 which means I'll have no decent light for those events. Okay, my question is, which one should I go for? Won't the SB600 make me look like a wannabe pro photographer at this stage? I don't understand the GN associated with these things so is there really a major difference in terms of power? Can the SB400 bounce off medium-high ceilings? (showing photos where SB400 was used would be very much appreciated) Why can't these camera manufacturers make a DSLR with a built-in flash that can be tilted? Thank you for taking time to read my VERY long post! Looking forward to your help.