ChrisH,

You are over-simplifying the scenario. There are many factors to consider before taking a job with any airline. While its great to look forward to the "Dream Job" that you will want to retire at you must also think about QOL until you get there. A 12 month upgrade can quickly turn into a 5 yr upgrade/displacement/furlough at any airline these days. Make your choices with the worst case scenario in mind and won't be disappointed later on.

Good luck,

-Bob