sweet indulgence robe substitute yarn

Hello all,

I am looking to knit up the sweet indulgence robe and am deciding on a substitute yarn. Any recommendations? I'd love to see any pictures of this robe that you may have knitted.

What about this: Laines du nord mulberry silk (double or triple stranded)?

http://www.knittingfever.com/c/yarn/laines-du-nord-mulberry-silk-2/

Kristin