You are getting a great, versatile, accurate rifle in probably the best caliber ever created. The .243Win is a true "do-it-all" caliber. Varmints, deer, antelope, coyotes--nothing is safe from you. You can load 75gr Nosler BT's to almost 3100fps or you can shoot 100gr Hornady A-Max to about 2900fps.
For a shouldered, high power rifle, do-it-all caliber, there respectfully is none better.
-Jason