Decided on a color combo and placed the order. Here's what I went with:

7- RB
1 - CB
4 - NW

I'm not 100% sure if I want to stick the CB (Blue) on the NW puck or not. I'm thinking so. That way I can fine tune the RB to prevent getting too much violet colors without sacrificing the CB.

Any ideas on where to put it? I was thinking close to the center.

My heat sink will look like this:

X X X X
X X X X
X X X X