Opinions needed

In other news, we got our Sockapalooza 4 pals today and I'm trying to pick the perfect yarn for her. She likes greens, blues, pinks and pastels, so these are the yarns I'm contemplating...
The first is Socks that Rock Watermelon Tourmaline.

The second yarn is from Th'Read Head Yarns and it is a 50% Merino/50% Tencel blend. You can see the sheen in it from the Tencel below.
It's Greens and pinks with just a hint of lavender where the pink and green blend together. I haven't really decided what pattern yet, but I'm kind of thinking a reverse RPM. My friend Teri did something similar and it turned out very neat.
The last contender for sockpal yarn is this Trekking XXL. Stripes of Blue, Green, & Pink. I'm a huge, huge fan of Trekking. I love to knit it. I was thinking Jaywalker or something else to break up the stripiness.
So, my friends out there in the electronic universe, which do you think I should use??? I'll be taking suggestions through Friday when I cast on.
In yet more news, guess who's coming to KC!!!! Just one of my favorite authors, Jennifer Weiner. The woman who wrote Good in Bed! Totally love her. Thanks to Joanna for cluing me in. I'm so there.
PS. Carmen, still not forgiven for not even stopping by with the boy... Teri even ditched her mom and stopped by.