I hadn't considered the R200 since fro that price I could pick up another 600. I'd like to keep things a cheap as possible as this light will be pretty much exclusively for a backlight.
On the other hand, I've never even seen the SB-30 until you noted it. Can you comment on it further? They are cheap and will do CLS without pre-flash according to Thom Hogan's site. Does this mean it's controllable from the SU-800 or merely that it will fire as a slave via CLS? If it's strictly slave then I may have to pass as it only has 3 manual levels.