PC Dave,
Must be nice to live in the high rent district. I can only afford to ski on the other side of the Wasatch range.
I have a hard time understanding why that cyl is so much lower than the others. Have you adjusted the valves on that cyl a couple of times? Also you might tap those valves with a hammer in case there is something on the seat. You might have a ring not seating properly. I have freed them with brake fluid. That injector may be injecting streams instead of atomizing which can cause a cyl wash and lower compression. Bottom line could be a burnt valve which could be cured with a valve job. A cyl leakage test could be useful here. If you end up with a valve job, make sure the machinist follows specs, because if he cuts those seats too deep, you can have real starting problems.
Peter