I am currently gold on Delta and have had my account with them for about 5 years or so. I am going to be increasing my international travel between PDX and Amsterdam to about 4-6 times a year. I was thinking of switching to NWA because of their KLM and Alaska partnerships which will help me in my within Europe trips and right here around home. But, I am seeing negative feedback about their WP program and international travel. So, any recommendations? Why not Delta? Because I have to pay so much more for an upgradable flight with no guarrantee that I will upgrade. The difference in price is getting significant.

Thanks!