I'm pretty sure that I've picked out my yarn:
It's Sundara Yarn it's Caribbean over Light Blue fingering weight. I'm leaning towards a twisted stitch pattern, here are some I'm considering:
1 & 2: From Nancy Bush's Knitting on the Road: Conwy or Canal du Midi (also lovely in green here).
4: Bavarian Twisted Stitch socks (on the Knitpicks site) from Cat Bordhi's Socks Soar on Two Circular Needles.
If anyone has feedback about these options, or similar alternatives, please let me know. The Canal du Midi is the front-runner, but I do waver when I look at other options! More lengthy reasoning for these choices (and another choice that I've pretty much ruled out) can be found on my blog. Thanks!