I picked up the Magnus early in December as well, and it is a lot of fun, but holy crap do those darts get deformed. I shot it into my hand and it stung, and I shot it into my foot and it left a red mark for a day. The Centurion seems like a massive step backwards, it's too big, less accurate, heavier, and I hear it mangles the crap out of the darts. They need to make a true clip-fed mega dart gun that isn't ridiculous, and it really should hold more than 3 shots.
Then again, I picked up the Elite version of the Alpha Trooper, oh man was that surprising, it really is a different plunger and it makes a big difference compared to Elite darts in my regular Alpha Troopers. I was trying to convince my gal to shoot at me with the Elite Alpha Trooper as I was using the Hammershot, she hit me once and it stung way worse than I expected, so I was firing from the hip with the Hammershot and a shot went wild and hit her in the face (I was aiming for center mass, but shooting from the hip is dodgy at best). She turned around and I thought she was laughing so asking her if she was ok and getting no response but laughing, I shot her in the butt, only to find she was crying from being hurt and laughing too. I felt like such a heel, but finally did show her how to use the Alpha and she hit me once and that was it for Nerf for a while. She has mostly forgiven me.
Picked up the Elite Firefly clip with darts at Target on clearance, half off. This thing works really nicely.