This looks cool and sounds most interesting. However I always tend to lose my plectra (leave them somewhere, put it in a wrong pocket, falling out of the jacket pocket, etc.). So I rather have loads of the 50 cent plectra rather than one awesome one that I will eventually lose.
Tortex 0.88, Nylon 1.0 and Delrin 1.14 are otherwise my plectra of choice.
But I take an expired creditcard as well as long as I can cut it decently into shape.