stout:
To cut to the chase, there's nothing "wrong" with the 1300.
ANY one of the American "Big Four..Remington, Winchester, Mossberg, or Ithaca) will serve you quite well.
However, you stated you wanted a HD gun that you can "put plenty of cool accessories on".
Issues of over-accessorizing aside, THE most accessorizeable shotgun in history is the Remington 870.
If there is a shotgun accessory available, it's available for the 870.
So, if you want a HD gun, any good pump from one of the Big Four will be perfect.
If you want to play around with additions to the gun, and want the widest possible number of options, the 870 will offer that over any other brand.