Keith
The best camera is one that still works!
My current favorite on the III is a collapsible summicron. If you don't get one in collectors condition, they aren't too expensive. I like collapsibles on my III since they (summicron and summar) are also light weight.
For another piece of stupidity on my part ... I had a (slightly rough) collapsable Summicron in LTM and gave it away! 😱