Headers recommendations

Hi all, searched but not getting the answers I need. This is for a 280Z head, round ports. Headers are available from different sources, MSA, Z Car Depot, Kooks, Flashark, eBay, etc. Need some of your experiences on quality of tubing, primary sizes, fitment, longevity. Looking for the 6-2-1. I'm staying close to stock, so no big power gains to plan, stock manifold has had its days. While asking, what about gaskets?