Reproduction Parts Quality

[HeavyD]

I am about to buy body parts for my 70 GMC project, and would like to know what other board members think about the repro parts they have used. Are most good fitting and a decent weight? For example, I have heard good things about tri-mark rockers, that they are equal or better than GM parts. What about fenders, whole door shells, hoods, etc?? Anything I should avoid buying in repro? I like good used metal but here in Saskatchewan everything is rusted out, and I can't head to the U.S. until I get holidays again.
Thanks all.