Copper Tank vs. Plastic Tank

What are your opinions on the effectiveness of aluminum core/plastic tank radiators versus the old school copper tank design? I need a radiator for a non-Mopar vehicle but am hesitant to go with the plastic tank design.

Plastic tanks tend to crack but the aluminum cools better. Old school doesn't cool as well. I will always go copper/brass over aluminum/plastic. All aluminum would be the way to go if possible because it is the best of both worlds. Sometimes you have to buy what is available because you only have one choice.