Hi Bill,
I just ordered a Jonah housing from Dave Marsh at uwphoto.com (located in New Hampshire). I went through the same survey of 10D housings that you did:
Approximate prices quoted with a FE dome, Macro port and ULCS arm set x2 were:
Subal C10: about $4.9k (housing only 2.9k)
Sea and Sea: about $3.8k (housing only 2k)
Jonah: $2.8k (housing 1.9k)
UK Germany housing only 2.4k (not quoted from uwphoto.com)
Had very good service from Dave through the phone from their store. They are the East Coast dealers for Jonah should you decide to go that way.
I was vacillating between splurging for a Seacam 1D housing to get away from the awful 10D focus, but in the end could not justify an extra $3-5k outlay (depending on how conservative I wanted to be with strobes, ports etc).
If you are starting from scratch (no ports from previous housings), I would look at the Jonah quite seriously. The Sea and Sea looks nice, but it Definitely looks like it is missing one button on the series of three near your thumb, and also missing one from the top row of four buttons near the top LCD display, as someone pointed out on another thread). Only plus (according to Dave) was that S&S has a depth insurance policy for the 1st year or so where they will replace your equipment if the housing leaks for ANY reason.
Again, double check on all this -- I wasn't seriously looking at the S&S housing so I wasn't perfectly thorough. Again, the Jonah, Subal and S&S are all in stock from uwphoto as of yesterday (Confirmed).
Email me at chng@fas.harvard.edu if you have any more specific questions regarding the choice.
Good luck,
Yeang
http://www.pbase.com/ychng