If you want to get out of your rut then stop listening to other harmonica players. If you really want to get out of your rut then stop playing for a few weeks. Practise writing with your opposite hand, learn to cook, learn to play another instrument do something creative that is not playing harmonica.
I guarantee that you will have a fresh set of ears when you return to the instrument
*It was Chris that made that statement, and I echo it whole heartedly. As an EX multi instrumentalist, I would advise you that listening to harp (and harp ONLY) is not going to get you as far as covering the whole spectrum of instrumenti.