this isnt one of the guns you mentioned but i just wanted to toss it out there. SCAR 17... i held one at a shop a while back and it was perfect! and your advice has been golden to me so i do still wonder your take on the scar.

but from the ones you mentioned the 901 seems to be a good look. maybe get the lower just how you want it and try swapping uppers as the next 18 years or so go by.