I dont think Delta or United are pounding down the doors of those Captains with 1000 TPIC. There are tons of individuals with well over the "magical" number trying to get hired on at a major. My point is regardless of whether you upgrade or not, the wait may be awhile. If you are able to work at a reputable company rather than one you're going to be miserable at, I take the reputable one.
Im speaking from experience.