KEH really worked well. I followed your advice and bought an SD body w/ wl finder, a 90 and 180 along with a 220SD back (will also get a 120 at some point) and some other misc items that were pretty inexpensive (extention tubes, lens hoods, etc.) All were in ex+ condition.
What do you know about the power back? Is it reliable or worthwhile? I can imagine it could be handy for some things? Again thanks so much for pointing me in their direction.