Thinking back to the 167MT vs RX dilemma, the RX, while not silent, is quieter than the 167. But they're all motor-driven SLRs in the end and will never be as quiet as a Rolleiflex. But if you like the Contax system, I highly recommend the RX. I had one for years, then offloaded it and my other Contax SLR gear to finish out a G2 and 21mm rangefinder outfit. Now I do find sometimes I need an SLR, so I added an RTS III when I found one at a price I couldn't resist.