Hitop all the way unless BC Ferries figures predominantly in your life. Many years of westies and we never did like the short season the pop top afforded.
But. My beloved old Catalina sailboat had a pop top that would, IMO, be ideal on a P25 with a moon roof. The pop top on the old sailboat had two easily zipped on covers, a noseeum netting cover for airflow, and a oiled canvas one that was rain proof. Each cover could remain in place when in the lowered position. The pop top only left enough room for changing clothes and food prep, but really that was all that was need to make a tiny boat livable. The pop top was a very simple fiberglass cap with a simple four pole raising system, and of course interior clamps to pull it snug again the roof deck. The one Delica mode I really wanted to do.
Just like it would be on a P25 Delica moon roof, there wasn't room for two people to stand; but it was always the preferred spot to enjoy the view with a cup of joe.
Can't wait to see your build, as your slid out rocks!
Cheers,
Kev