Anything based off the 700 platform or the Tikka platform with give you the most affordable options and MOST options. Savage next IMO. Savage changes bottom metals up quite often and aftermarket stocks are going to be limited to an extent. That being said, they offer the easiest, most affordable, barrel and bolt head switch. Reason ARC and Bighorn went that route is just that reason, it works and is a afforded option. Anyways… take your time and look for a deal as it seems you have plenty of time to figure out your best road map for his rifle.