Okay, here's my opinion....
I've have used Duff's ceramic coated, L & L from Jeff's Bronco Graveyard, Hookers and Hedmans. My opinion is that the Hedmans are the best, but only if you follow this process.
Do not order the Hedmans and then try to wrap them. Wrapping headers definitely reduces the heat, but it is a pain in the ass chore and this will definitely accelerate the rusting process. Call a company called Jet Hot in Pascagoula, Mississippi and tell them you want to have a set of headers coated. Then tell them that you would like for them to provide the Hedman headers and coat them....instead of you buying them yourself and shipping the headers to them. They get the headers directly from the maunfacturer and YOU save $$$$$$. I did it this way and was VERY pleased. Also, these hedman headers are very easy to install.
As for the others....
Duff's coating flakes off within one year. The L&L's are so hard to install that you will either ruin your marriage or kill your dog and the Hookers are not Bronco specific....no matter what they tell you.
Hope this helps.