Since it's purely a personal choice, my comment won't help. Went to college with the guy who will retire number 1 at Delta also with the guy who will retire number 1 at UPS. Both are happy with their choices.
Shockingly enough, another college classmate would've been top 5 at Delta left for UPS. Some days were better than others, but he is definitely happy with his choice.

Upgrade should not be 13 year s for you BTW.