And then with the remaining gazillion blocks, which of the four following layouts should I go with?
The two zigzag quilts.. one has the color going up and down, while the other has the color moving left to right. Either one of those, of course, could be with either zigzag pattern. Then there's the diamonds. I was aiming for a "warm/cool" contrast here, but I think you lose that in the left picture. It doesn't help that the point of the colors is to be the whole spectrum. That means that a lot of my purples (supposed to be cool) have red in them, which is warm... etc. I like the diamonds on the right quite a bit. But do I like it better than both of the zigzags? Would I like the diamond on the right even better if all the colors were just mixed together and it was "color vs white" as opposed to "color vs white and warm vs cool?"