All these blues are really nice (particularly MCB), but I'm a red guy and will wind up going with my favorite color of all time for my soon-to-be-ordered E92 M3... Melbourne Red.
OP... you mentioned early on in your thread "RIP Estoril Blue"... what was that in reference to? Do you no longer have your E46 M3 or has the color itself been discontinued?
I've been a huge fan of your Estoril Blue E46 M3 for quite sometime by the way... nice car!