I have a 280AI w/3.5 X 10 Zeiss Z-600 reticle, McMillan edge stock, Rifle Basix trigger (Much like your Option A) that weighs under 7 lbs. empty with sling. Shoots great with either AI loads or with off the shelf 280 Rem. Great .284 bullet selection that will take you from coyotes to Elk.
Have a safe full of great rifles but this one sits on the front row!!!!
Ennis
Fayetteville, GA