I'm using a d40x and I want to get a decent flash with off-camera capabilities and some other perks. I'm a poor college student, so $ is a pretty enormous issue. I was looking on ebay and a few other places, and it looks like I can get a nikon sb-28 for under $100, plus there are the sigma flashes and the sunpak ones. I was just curious what peoples impression of the sb-28 and other less expensive flashes, and if I'm going to see any severe limitations versus the sb-600. I was trying to decide between a new lens and a flash, and it seems like a flash will give me more options for my pictures. Plus, my friend is taking me on as a sort of apprentice in wedding photography and I'd like to really get to know what I can do with a flash before I make myself look like a jerk on one of my first shoots. And no, I won't be using my d40x at weddings, lol.