Thanks everyone, very helpful.
I do have Premier status, and in fact flew to Peru two weeks ago and did not deal with the Xray machine then. I was surprised to hear Dulles had them already, that was FAST.
230 sounds like a good time to arrive then. Iron out any issues, and then sit in Vino Vino relaxing with a nice glass of wine before heading to my gate.
UA requested an upgrade with Austrian, but I doubt I'll get it. I have been getting repeated "teases" lately that I am on the upgrade list by UA but it hasn't happened yet.