Would a reduced wage make you unhappy? Would the change in job give you a greater sense of self esteem and satisfaction, but still allow you plenty of free time and disposable income to do the things you want to do or have become accustomed to?
Of course there is more to life than money and job satisfaction, but the old adage that the grass is always greener plays true here.
You really need to weigh up all the benefits and shortcomings, but if you are really really unhappy in a job then you should try to change it either by moving, or finding new challenges in your current place to lift your spirits.