I have a mixture of dovetail, plate, and specific sight mills. I've used both Burris and Holosun sights. I still have the dovetail mounts with Burris FF3 sights on a P-09 and a 97B"E". I have CZC plates on P-10F OR and P-10S OR with the Holosun 507C sights on both. My preference now is for the OR cut and CZC or CZ plates and Holosun 507C sight. That gives you plenty of options--if something comes out that is "better" than a 507C, you can go to it. Everything is very rigid and trouble free. The sight is much lower on the gun than a dovetail. The 507C sight has a very crisp 2moa dot with plenty of steps to set the intensity. I have had no problems or failures using both Burris and Holosun sights, with many thousands of rounds through the Burris equipped pistols. I'm still new to the Holosun but that is what I will buy from now on, but I'm not in any hurry to replace the Burris sights at all as they are fine as well.
I don't require co-witness on the match/demo guns so the height of the plate is of no concern to me. Milling for a specific optic should make co-witness easier since the optic is lower on the slide.
Joe