While the salary they are offering is still above national average, breaking the golden handcuffs seems a daunting experience.
Have you ever done this, or something similar? Did you regret making the change, or staying? Looking for advice!
Both times were major disruptions, and maybe for a year or more didn't seem worth it. Two years out for either one seemed well worth it. You absolutely will regret it at first, and intermittently for months. That's not to say you shouldn't do it, though. Sounds like you're in an ideal place to make that kind of career change.