I gave 575 for my Mossber 930 JM Pro, and seen where they are hitting shelves for about 600-650. I say go with the JM Pro because it has Nordic parts already, is threaded for chokes, and I prefer a 22" brl over a 18" right now. Eventually I may get the 18" brl, and a 26-28" brl for hunting but having 9 rds at hand is awful nice. Weight wise it is about the same as an 870 so that should not be a concern.
Men you can't trust, women you can't trust, beasts you can't trust, but Bussekin steel you can trust