Thanks to Stuart, I recieved my new pistol this morning and shot it this afternoon at the range.
I've shot my son's SPO1 Shadow with comp hammer a lot lately, and still had better results with my 75B and it's lighter front end when doing transitions. .
I needed a new gun (who doesn't

), so I took a chance on this Shadow with the full length guide rod, no firing pin interrupt, heavier barrel, shorter dust cover lower without the heavier tac-rail front end, but with the up-swept beavertail.
I asked for and recieved a 3# SA trigger and the DA was measured at 7.15#, 13# main, 11# recoil springs. The SA break is crisp and smooth--really. The reset is noticeably better than my 75B with a Shadow Hammer and a mixed bag of work on the action.
The DA pull is smooth and predictable but feels a little heavier than my B set-up was. I'm going to shoot it as-is for several hundred rds so the pistol (and the shooter) can settle in before I change anything.
I ordered the HAJO rear and FO front sights and they were exactly as described: the same as my 75B Comp rear but adjustable for elevation.
At 10yds the pistol shot about a 2 1/2" group off the top of my shooting bag. I moved the target to 20 yards and shot a 2" group---BIG SMILE HERE. This is good for me and even better, they were all around the one inch red dot--no adjustments made!. Whoo hoo. I had two white carboard 7" "plates" set up at plate rack height at 20 yards and they were being hit smooth and fast. I got a dirty look from another shooter for firing 5 quick shots into one plate. "NO RAPID FIRE" was the mental message.
It came with three 19 rounders and I function checked them and the mag drop and the new DOH that I ordered with the pistol. All ran smoothly. I tried my 22 rounder and it ran fine too. The new holster was still stiff and not quite willing to release the pistol without a determined pull. I adjusted it some, but it'll take some time in the holster before it feels smooth on the draw and shoot..
The cases were flying about 5'-6' and just barely behind me---good. I christened it with the Berry's 124 HBRN at 129 PF. I also ran a mag of Zero 125 JHP and M.G. 124 JHP at the same PFs, again all three ran smoothly and shot to POA.--thank God, I have a bunch loaded up.

Today was just a get-to-know-you session. I'll give it a more careful workout soon.
Results so far: I'm HAPPY!