Best barrel material for new Grendel build

[NDSwede]

Hello everyone, I’m getting ready to order my first Grendel barrel. I can get it in stainless, parkerized, or nitrited. Is one better than another?

This won’t be a high volume shooter. Maybe a couple hundred rounds per year. If I shoot out the barrel I’ll just buy another one. My criteria are:
1. Accuracy
2. Rust resistant
3. Looks good

Mainly interested if one type is more accurate than another?

Thanks for your help.