If you've got the money, then get the GK1, and you might want to do it now, given what's going on with tariffs.
The following pistols aren't PCP's, but they're the air pistols I would be shopping for if I didn't already have them...Crosman 600, Crosman Mk1, Webley Tempest, Beeman P17.
The one air pistol I wouldn't buy again is the Beeman P1/HW45. It's performance is disappointing considering it's price point.
I also wouldn't purchase a Hatsan Jet again, but I regard that as more of a carbine than a pistol, which is something that PCP air pistols seem to inevitably morph into. People want more shots per fill and better consistency, so they opt for larger reservoirs and then find that the gun is too large and awkward to be used as a pistol and they add a folding stock and a scope.
