I'll give some food for thought. First, if pellets are your intended ammo, then I'd make sure the P3 was an LR barrel, as that's the pellet version. The other versions may shoot pellets well, but are more for slugs, my opinion.
I don't have a power pup, but I do have two Dreamline Tacticals. One is a 500mm 25 and it is a true laser, a keeper gun for sure, even though every gun gets boring after a while. It eats 25 grainers for lunch and spits them out in signle hole groups all day long at 35 yards. At 100 yards, it's a 1-1/4" shooter with me shooting off the bed of my truck.
Bullpups are hard for me to shoot well, the only one I've bonded with is the Impact, and I like it, all the rest can languish on store shelves as far as I'm concerned. Although I do have hankering for a Zelos.
The Dream Tac has lots of power, even for slugs, and liners are easily changed to whatever your current favorite ammo is.