I..the thing about spring guns having to be held differently is bit overblown. True if you zero them off sandbags, they'll shoot to a different point of aim while being held due to the spring recoil acting differently, but I never found that to be a huge issue. I just zero them while resting on my hands and not the actual sandbags.
They will kill cheap scopes though. The magnum spring guns will kill even the cheapo "airgun scopes". I've had good luck with Bushnell Elites and Leupolds holding up fine on magnum spring guns though.
I've been into quality UK/German, Euro spring rifles for a bit.
There's the 'artillery hold' you will read about, then there's what you do with any centerfire rifle. Experiment with EACH spring-air rifle you own, as some will work 'better' with one hold then another. Tape a post-it note onto the stock so that you don't forget which hold that particular gun may like.
Make sure any scope you intend to mount is Airgun-Rated. If it doesn't say so in the manufacturer's marketing info, assume it is NOT...and don't mount it. Basically, you get rearward recoil like a centerfire at discharge. THEN...it slaps forward as the pellet has left the bore, and the internal piston comes to an abrupt hault. It can tear the lenses loose from inside the tube. Centerfire-only scopes are not braced properly for this.
Airguns of Arizona is another good place to look. FWIW
They have almost nearly cornered the USA market. Besides retailing themselves, they also distribute/wholesale to other vendors.
PCPs can be filled with hand-pumps, and you can get a good anerobic workout doing so! Dive shops may refuse to fill your tank/s without a diver's certification card. Take your rifle with them to verify your intended use, LOL. Buying your own compressor is also a consideration, but I have no experience with them.
If you DO get a PCP, get a moderator. They can be GUNSHOT loud! Integral is best, but there seems to be 'some' common sense out there in recognizing what is intended for Airgun Use ONLY, versus the more heavy-duty cans intended for the blast and flame of firearms.