<p>Hi Jamie, I own and use Leica M4, M5, M6, M6 TTL and M7 cameras. My favorites are the original M6, M4 and M7 in that order, with the M7 my go-to rangefinder if I want the quietest rangefinder to shoot with, though the others are reasonably quiet in their own right. In lieu of the 50mm Summicron - I have an old 50mm black Summicron made in Wetzlar, I am now using the 50mm f2 Carl Zeiss Planar. If you're looking for a cheaper alternative to the Summicron, then I highly recommend the Planar.</p>