Here's my take on the poldy, the nemesis and paps 2.1 since I've owned them at some point. I'm hoping the 2.5 will arrive this week and I will update accordingly.
The nemesis trumps all of them. It feels good in the hand and the finish is excellent. Easier set up for
batteries too and you don't have to fluff around with a screwdriver. The poldy is damn leceh to set up, especially when you change attys or change battery size.
The nemesis hits hard, sub ohm attys might need to be recoiled. I feel the poldy hits as hard as the nemesis. The paps 2.1 was a hit and miss for me. It just doesn't feel right, maybe I had a lemon.I sold off the paps as i keep having problems with it. I had the trigger button pop out on me and I had to get on my hands and knees looking for the spring. The firing on the paps is just OK OK only, nothing to rave about.