So, don't take mileage runs then ... but does your wife frown upon you flying to say, Seattle, to meet up for a gathering of Flyertalkers? How about two months from now in Chicago? And two months after that in California? Come on, I'm sure your wife will understand you want to meet all your Flyertalk buddies?

It looks like you should be fine with DL. If I were you I might try and lean towards UA simply because the connections will at least hopefully bring Premier within your reach, with maybe a few trips to see all your good Flyertalk friends in various locales.