You can make serious coin at Delta after only a few years. Be senior in your equipment and live in base --> you'll be a green slip machine. By year 5 you'll be moderately senior in the 737 or 757/767 and at that payscale $200K is easily attainable if you factor in the 15% DC plan.
Then you'll become enamored with four stripes, bid 88A/717A, go back to reserve and take a pay cut.
(And things are only going to accelerate.)