Chrome vs Ceramic
Ceramic coated headers have several advantages over chrome (or even stainless steel).
1. Chrome will bake off and the headers will inevitably rust. Ceramic won't, and it will last a lot longer before any rust shows up.
2. Chrome discolors almost immediately - ceramic does ont.
3. Chrome does nothing for heat transfer - ceramic blocks a lot of heat. This is a real concern unless you like hot, toasty feet in the summertime (OK, it might be an advantage in Canada in the winter time).
4. Chrome does nothing to maintain the heat INSIDE the pipe, where it increases flow and flow velocity, both of which help power production. Ceramic helps both goals.
Things to look for when shopping... Ceramic comes 2 ways: coated outside only, and coated inside AND outside. The double coating is the best. Probably the priciest, but if you plan on keeping the car forever....
"You can never be free until you let yourself go."