Just to add, after searching online, I came up with this option:
{{!gwi}}From February 1, 2012

Does this look OK? Or am I just bleary-eyed?

It looks good to me. It appears to pick up all the colors in your 3 big elements. Does the same color combination happen to come in multi size configuration. I used the multi size mosaic pictured below in my kitchen and I really like that look too. You might want to consider something like that.
{{gwi:1590893}}

Just my opinion, but I think stained wood cabinets (like the beautiful color you've selected) really warm up a space. So I think you'll be fine to use a cool toned backsplash with your counters.

I agree with the above comment that your wood cabinets will warm up your space. However, you`ve chosen quite a busy granite that will likely be the focal point of your kitchen... Are you sure that you also want a busy backsplash? Imho, I`d be looking for a monochromatic tile for your backsplash. A bluish-gray glass subway tile would be very pretty.

Badgergal - it only comes in that format, 1"x1". I'm trying to think of a way to use a plain (maybe stone) field tile to make it both more interesting and less busy, does that make sense? I got a sample this morning, and really like it in person, but I worry about using all glass tile.

Pricklypearcactus - the cabinets are warm, but they're also less red than the sample shows. It's so hard for me to visualize what everything would look like installed, just from the little samples. Thus, I need help! I'll post another moodboard of the other option we've considered so far, that I worry is too cool.

Laurajane02 - the granite picture I used seems quite a bit busier than Pearl Blues I've seen, although the colors are the same. In person, there seems to be less contrast, but I do worry that an entire backsplash of 1x1's might be...frenzied? But I have seen similar backsplashes that are beautiful, so I don't know.

Here's the grayer backsplash tile, that I think might be too cool:

On my monitor, this seems like a good match:

How about combining your tile choice with something like Laurajane02 mentioned, "bluish-gray glass subway tile". You could use the subway as the primary and a 3" or 4" band of the 1" x 1"s; I think there are several samples of that if you search backsplashes on the FKB.

I think either of your 1" x 1" choices would work nicely; if you want to 'play up' the blue in your BP, use the blue based one; if you want to 'play up' the grays, use the black based one.

I think 3 mutts has a good idea of combining the mosaic with a glass subway tile. I really like the colors in your first mosaic. I think the browns will look nice with the cabinets. The lighter colors in the mix will look great with the Cambria Torquay and off course the blue/ gray colors will compliment the granite. By using a combination of glass subways and the mosaic the backsplash will be less busy than all mosaic but still have a nice interesting and colorful element to it.

How about waiting until the floors, cabinets and countertops are all installed and then looking at the backsplash tile samples next to them in the light in your kitchen? It is hard to guess how the various colors and materials will interact together.