Best dealership in PDX?

I picked up a 2016 Ecoboost convertible a few weeks ago. I'm thinking about getting the Ford Performance Tune which I understand needs to be installed by a dealer to retain the warranty. Does anyone have any advice on which dealer in the Portland area would be the best to approach about this?

Landmark has been very good to me. Many of their mechanics are gear heads.

I have a friend who is a service writer at Landmark, he says they do a ton of this type of thing as well as Supercharger installs