Well, like everyone else said, it depends on what you want. If I was happy with a Springer, then, the high end guns aren't worth it. However - - - -
Started the PCP world with a Marauder. Great learning platform and plenty accurate to maybe 75 yards. For some reason, after 75-ish yards, accuracy falls off.
Being quite OCD, accuracy is a must. So since my goal is to shoot 100 yards or more accurately, I decided once in my life to buy the best I could find and picked up an Impact. For accuracy you can't beat it. It's kind of a finicky gun, but at 100 yards, if I do my part, I can hit bullseyes, and I mean dead center. It's not all the time, there's still a touch of variability, but there's no chance with the Marauder, but a very good chance with the Impact.
If you want to hunt under 75 yards, Marauder is a great gun. If you want to shoot bench and have a reasonable chance to hit the bull, then the high end guns are a must. It all depends on what you want to do with the gun
Think of it this way. If you are a golfer, you have a whole bag of clubs. PCP's should be the same thing. Short range gun kinda like a chipping wedge, driver for the long shots like an Impact and several in between guns just to cover all the ranges. Sounds like fun to me!