headers vs manifolds

[GMCrazy]

I'm rebuilding my GMC's 327, and im debating on keeping manifolds or adding headers. ive built a 350 before and put headers on it, however, I had continuous gasket blowouts. I tried the "no blow" copper gaskets with no luck, and Ive heard several other complaints about headers. What do you guys think? Are the horsepower gains worth the extra heat and blown gaskets? I also want to keep the truck relatively quiet, but of course I want to squeeze out as many more horses as possible. Thanks, David