I also believe that the right smith can tune or build a 1911 from the ground up that will hold its own against the Mark 23 in terms of accuracy but you will give up reliablity in adverse conditions to get there. Depending on the smith it could be done for the $1900 mark but more than likely it will cost you more.
My son bought his Kimber tactical custom II slightly used for $800 and I do love the gun! Dont get me wrong, I do like the platform. I am astonished and some of the wilson combat guns ... you talk about