Beautiful execution, Lou!!
Personal opinion: The material in the third one (I believe I know what it is, but will not say if you want to keep it "secret"), is a material Dawn and I have been playing with as well-I think it looks better with silver fittings to pick up the reflective quality of the material. If you don't like chrome or sterling, the satin finishes might be nice also.
I do think it makes a really neat pen!!!
Keep exploring!