As for why not .308...I don't like my options. The less expensive rifles don't impress me regarding reliability, and the more reliable ones are pushing $3k for the basic rifle.
You could get a LMT MWS for around $2400 new (going around $2100 for used in good condition) . They are no OBR but well made, accurate, and are fun to shoot (especially after putting a PWS brake on it). You can take them out some distance as well. YMMV.