The fiber is from French, yes. It's all I have anymore.
I did try Satin again, Briefly, at the beginning of this year, but the one doe produced pitiful amounts of fiber (turned out she had some weird liver condition) and I couldn't keep the buck on feed. I also had another doe that had to be culled to cystic mastitis who produced 2 kits for me before that happened. I couldn't tell you how many ounces they produced off the top of my head, but in six months I only got enough wool to make a few small skeins from five rabbits.(Basically only the finicky buck was the only rabbit actually producing any usable amount of fiber.) It wouldn't have amounted to a third of what my French produce in that time. It is possible it was just the lines since they were new to me lines, but I won't go back to them between the poor production (due to random health issues) and the constant matting. (I'm pretty spoiled grooming once a week with my French)
You can get good depth of color from French if you start with that in your herd and breed towards it. It's definitely one thing I look for when buying new stock. I often notice it more in shorter coated angoras though. I'm not sure if it's true, but I have always read that they have the same amount of pigment for each hair as a normal coated rabbit, just spread over a bigger surface (read, longer hair). Most of my herd is fairly short staples at the moment, so it makes sense to me that their color would be less washed out following that train of thought. Hopefully breeding towards a longer staple can help me prove or disprove this theory.
As far as halo, I never saw much halo from my Satin, and I have no experience with English or german. The French produces a very heavy halo usually though, thanks to all the guard hair.
Honestly I think your best bet to get Satin would be to cross the mother and son. You wouldn't be able to guarantee the gene is passed on by the son to his litter, and then breeding them back to their grandmother may or may not result in a Satin kit. You should have approximately a 25% chance breeding the son to the mother. Or a half sibling back to he son should have the same odds. Hopefully having german in there will up their production a bit, by then again, I did have many health problems with mine, so it could have just been my rabbits that produced poorly.