John this is just my opinion from conversing with you and what you like to do with your leaders, that Silk isn't going to do what you want it to. It will either float or sink, but not simply submerge. I would say it is more supple than Danville, but again that is my opinion. Michaels explination of this is very good. For me and what I like to do Silk fits the bill great! They are extremely beautiful, and have a much nicer smoother twist to them.

Cheers,
Brandon