In search of a Contrast Color

It's time to get a start on my holiday knitting, and maybe also pretend I'm actually participating in the Summer of Socks 2009 while I'm at it (it would be nice to finish at least one pair of socks before SoS ends). I have several people I'm planning to knit socks for, but I need help with my yarn choices.

1. Socks for S

This pair is going to be for a man with size 10 feet, and I plan knit the Diamond Waffle pattern (though probably with short-row heels and toes), and I want to use this yarn:

It's Colinette Jitterbug, and according to the ball band the skein has 267m. Although that's more in yards, it's still under 300 yds. So I'm planning to do the heels and toes in a contrasting color. These are the options:

I have plenty of the Lorna's Laces, but the yarns feel like a fairly different gauge (the LL seems thinner, although according to the ball-band info for each, the Jitterbug actually knits up at a slightly finer gauge), and the ply and texture are a bit different.

The Cherry Tree Hill is a similar gauge and texture/ply, but I was planning to use that for a different pair, for someone with perennially cold feet who will want socks as tall as I can knit them.

The Wildfoote (sorry that pic is so dark--the colorway is Brown Sugar, and you can see the colors better here) is closer in texture to the Lorna's Laces than to the Jitterbug, but I have plenty of it. I'm just not sure if the color combo with the green would look too Christmasy. This guy does celebrate Christmas, but I wouldn't want him to feel he could only wear these socks once a year!

2. Socks for H

I'm planning to knit the Herringbone Rib socks (here's a Rav link with better pics), using the blue Cherry Tree Hill shown above (approx 420 yds/sk). Or I might possibly knit Leyburn instead (here's a Rav link with better pics). If I use some of the Cherry Tree Hill as the contrast yarn in the socks for S, will I have enough to make nice tall socks for a woman's size 8 1/2 feet? If not, what do you think about doing the heels and toes in this color?

It's also Cherry Tree Hill, so no concerns about gauge or texture not matching. I think the colors go well together, and H likes fun bright colors in her socks. My only worry is if a contrasting heel/toe will look weird with the herringbone or the stranded pattern of either of the sock options. Thoughts?

3. Socks for me

I have been considering using the turquoise Cherry Tree Hill above to make a pair of Pomatomus for myself. Will I have enough if I use some for the heels and toes on socks for H? Another yarn I've been considering using for Pomatomus is this (Artyarns Ultramerino):

But I worry that the pattern won't show to its best advantage in a non-solid yarn.

4. Socks for C

Finally, I'm planning to knit some fairly large socks (I think men's size 12?) with this other colorway of Lorna's Laces:

I could just do basic ribbed crew socks, but I'm trying to think if there's anything a little more interesting I can do that won't be obscured by the variegation, and also won't be too weird for a guy. This is a man who's definitely in touch with his feminine side, but that doesn't mean he chooses to express it through his wool socks (that's what the platform heels are for).

There are actually two or three more pairs of socks (including one for Taz) I'm hoping to knit in time for the holidays, but let's not get carried away right now. I only have so many pairs of dpns! I am itching to case on for something sockish, though, so any advice on my contrast color issues will be much appreciated!