There is another alternative you may wish to consider, they are from R and W targets out of North Carolina.
www.randwtargets.com My wife and I did quite a bit of research when selecting a 3D target to stock in the small sporting goods store we recently opened and found this source. The targets are made from the same materials as the Mc Kenzies with the same process yet they have a better appearance and are about 1/2 the cost. I don't know yet how they hold up since I haven't had any feedback either good or bad from customers that have bought them. I have a McKenzie I bought last year and a Blue Ridge I have owned for about 5 years, both are holding up pretty good as far as shoot throughs are concerned although I replaced the vitals on the Blue Ridge about 2 years ago. My main problem with both is that they are being degrade by UV from the sun and the outer 1/4 to 1/2 inch seems to be disintegrating. The R&W has a different outer coating that may or may not solve this problem, only time will tell.