And yet Benelli seems to be consistently outsmarted by a hunk of plastic...
If I bought an M4 (which trust me, I've thought about). I guess I'd go with the Mesa Urbino. Which isn't my favorite stock design, but at least is 12.5" in LOP and has a cheek riser for when you mount an optic. Add a Ti tube extension to de-neuter the capacity, and the IWC light mount and you could have a decently setup M4. For about $1000 more than setting up a 1301 or about 1800 bucks more than the Yooper.
Which still doesn't stop me from considering it, since I'm on a big shotgun kick right now and when I'm spending Daydream Money it doesn't matter what I spend...