I'll be using my RB67 for the first time on an upcoming trip and I want to burn a roll or two of slide film. I normally don't shoot slide film because the only way to print it is with an internegative or that-process-that-shall-not-be-named, but I just want to see some 6x7 slides on the light table while I can still get transparency film. I will also be testing how well my Mamiya "C" lenses look using color film. I won't have any color correction filters, I don't know how accurate my shutters are, and I meter only sloppily. What would be a good first slide film to try? The last slide film I used in 35mm was Kodachrome 64 and I always loved it, especially the reds.