best antifreeze for old cars

Ahh for the days when you just bought Prestone, it was green, and there were no choices. Now that we have a rainbow of antifreeze types, and those colors don't even seem to be standard anymore. What is the best type and brand of antifreeze? I'm putting in a new Cold Case aluminum Radiator in a dry freshly rebuilt motor, so the past is irrelevant. Cold Case says "use the green stuff" but as I read the descriptions on line it is clear that all green anti freeze is not the same. I'm leaning toward Zerex Original Green?

Which ones are different, and how "different" are we talking? I run green Prestone in my Duster (or generic store-brand green in a pinch) with a bottle of Water Wetter or equivalent. I also make sure to drain and refill the coolant every 2-3 years since that's just what you gotta do with the "conventional" stuff.