It's been really interesting to follow this post. When I got out of the military I had a couple of offers from some very high end flight departments. Money was at the level you are talking about, equipment was fantastic, etc..etc.. But, as one person said in this forum, I was always going to be someone else's beyotch...". So I went with the airlines.
It'll suck for a year or so for you compared to your old gig and there'll be a financial hit early. No way around that. But long term, they just aren't comparable. Although, like you, I'd have made more money out the gate with the corporate job; the QOL and flexibility of schedule I've had as an airline pilot is just beyond compare.
In the end, it was the best decision I could have made and I'm glad I'm flying in the airline world vs the corporate world. I hope you end up feeling the same way. Happy holidays and good luck!