Thanks for your input. The folks at my LBS didn't think a suspension seatpost was a good idea for me, either. So that's out.
I've been reading about Serfas saddles. Don't they offer a 90 day comfort guarantee, or something like that? That would make buying one of their saddles a little safer - if I could return it and try a different model if the one I ordered didn't quite work out.
First, I'll use my Planet Bike saddle a few more times and see if it's merely a question of either adjusting it or adjusting my position on it. If that doesn't help, I'll likely try a Serfas saddle next.
One thing I have not yet experienced is perineum numbness. It doesn't mean that I won't, of course. A wide/deep cutout has its advantages.
At this point, I would gladly spend more for a saddle if I knew ahead of time that it would work for me. But that kind of guarantee doesn't seem to exist. Our bodies are too varied.
I like everything else about the Quick CX 4, and I don't experience any other kind of discomfort during or after a ride. So, I assume it's a saddle question. Once I solve the saddle riddle, I should be home free.