Good choice.
I dont have a vested interest in the CP88 or Umarex....its just the general view of the 30 or so members of the club.
Some of the more compact models may look better but they simply dont generate enough power and accuracy in comparsion with the CP88. (Barrels too short)
However...to fans of other similar guns...this type of gun really doesnt need power and accuracy to have repeating fun plinking sessions.
Im just working from the comparison view.
For the record the CP88 comp managed 423 fps with Hobby pellets
Berretta 385 fps
CP99 330fps
PPK 283 fps
S&W 8 inch barrel 421fps
Gamo P23 380 fps with balls
Anics approached 480 fps with balls (4.5mm balls only) but were very agricultural with massive triiger weights......maybe 10lb pulls!
Cant offer more advice....theyre the only models tested over the years outside of the Target Gas stuff.