you're a little too enthusiastic about the rate of the US dollar, I think... Wouldn't that translate into like $500 US...???
I think I have made my mind up to get a clean RB67. It seems like it gives a lot of value for the money, and if the lenses are good enough for SI covers, then I'm sure I'll be happy. I really don't mind that the camera is heavy, in fact, I like it. Makes it sit really still on the tripod.
I do intend to keep the Rolleiflex, by the way. It's too nice of a camera to give up. After I get the Mamiya, I'll probably have it sent in for a good service to keep it in shape. I really do like the quality it provides.