Blaser is the best option but very pricey.
+1 on the Blaser. Pricey - yes; Very Pricey - yes, if you MUST hast all the bells, whistles and glitz. JMHO.
I recently 'treated' myself to a Blaser R8 Pro and a couple extra barrels. In the little time that I've had to it, all I can say is it's are boringly accurate - regardless of which barrel is installed.