Find myself in the same tough spot.
Significantly better pay in current (mundane) IT position, but the job satisfaction in an imminent PCSO position will be so much higher... I figure it's better to live without regrets and and give it a shot - I can tolerate a bit less take-home if I'm doing something I'm passionate about. Rather than resenting my career every day for the sake of a few quid.
That's my current perspective anyway, good luck making the right decision for you