Just me, but I've always preferred blue/casehardened to nickel. I've got plenty of nickel SAA's, but like the blued one's best. And paired with Ivory grips they really look good. When nickel get old or wears it can flake which looks horrible, but when bluing wears it looks just fine to me.
Blue/Case the classic, I also have both but I also have silver plate and blue is still my choice if you get down to the nitty. The funny thing is Nickel costs more but the blue and case should cost more since the procedure is longer to produce the gun.
Real cowboys carried work horses in blue. Pimps and gamblers carried nickel to be fancy pants. What was general Pattons quote? Only pimps in a Louisiana whore house would carry s MOP grips on a SA. Or something to that effect.