Thanks for the great photos of your yarn and sock! You're sure right...this yarn is fantastic. I really like how the colorway is distributing itself. Reminds me of the subtleties of MadelineTosh yarn. I'll have to look into this Cascade Heritage Paints.
I get so confused about the new handpaint yarns these days. Not sure which ones will stripe, which ones will pool, or which ones will look like your delicious sock.
Edited to add:
I found the yarn on WEBS. I think your color is "Forest", right? I put two hanks in my shopping cart!