New guy ordering a barrel

[Texdoug1]

Hi all, I'll be ordering a Lothar Walther barrel in the next couple of days and thought I would get your 2cents on exactly how I should order it. I had planned on ordering a 16in 1:8 twist with a standard carbine length and size gas port. I plan on shooting this, almost exclusively, using 200+ gr bullets with a suppressor. Would ya'll do anything different? Also, I ordered an adjustable gas tube for it because it made my 6.5Grendel run so much cleaner. Is there any advantage to this? From what I've read here many of you are having trouble building enough pressure using subs, much less trying to lessen it.
Thanks