I have a F30 in a fuji housing (same one used for F31).
I added an Inon D2000 strobe. I think this is the best choice for optically fired strobes. You can use it manual or the STTL function. I mostly used STTL and it works great. Really nice. I recently did a week in Kona on the Agressor and I was very happy with my F30/D2000 combination.
I use this tray and arm:
http://www.scuba.com/scuba-gear-540/068293...Single-Set.html
It was donated to me by my brother-in-law when he upgraded to DSLR. It works fine and is very small and compact. I do wish sometimes that I had a handle to hold on to. For that reason, I'd choose either your first or last choice in your list.
Regarding your list of choices, they will all work. Only thing I'd look into is how the optical cable attaches to the camera housing. I have the inon mount base because I also have Inon add on lenses (165AD fisheye and I'm going to add the 165AD close up lense).
The mount base has a provision for the optical cord. This is the mount base:
http://www.inonamerica.com/products.php?pr...10&subcat=1
almost forgot you also need this if you go with the mount base:
http://www.inonamerica.com/products.php?pr...=4&subcat=1
You don't need the mount base and the optical setup like this. But if you're going to use add on lenses, then it makes sense.
If you notice, the ulcs option you listed has an optical cable with a velcro setup which will do the job. The other bundles you list say optical cable, but check that there is a way to attach to the camera (like the velcro setup). The big advantage to inon setup is that you are also provided with a cover for the internal flash so none of the internal flashes light gets out and causes backscatter or the exposure to be off.
You could order this:
http://www.inonamerica.com/products.php?pr...=6&subcat=1
and hook it up to your camera.
It's not necessary, but it will help in certain situations.
So, after all that, I'd just order option number 3 you listed. It has everything you need and will fit.