Running new lines for EFI- who's using what material?

Getting ready to tackle this end of my project in the next few weeks. I have 3/8" feed and return now (steel) but have a few rolls of Nicop (3/8" also) and was planning on rerouting my lines on the car since the Nicop is super easy to form but just want to see what others are doing? The car will see with ethanol unleaded or possibly E-85 once I get things sorted out...

Thanks,
JW
I'm using a "corvette" filter/regulator, so I have a single factory steel line for the feed. At all the connections I'm suing barb fittings with a hose clamp and auto parts store rubber line.