AGD makes a great product and with the RT valve will shoot as fast as an electro if you can get the sweet spot down, IF.
I have shot a Timmy, my friend has one. It is fast as any and never chops paint. It has an anti-chop eye and multiple fire modes, and "the biggie" an electric trigger. The only way I would go with the mag is if you are a small person. The Timmy feels like a pump shotgun out in front of you, the Mag will be more compact.
Just depends on how you play, if your in the trees get the timmy, if you are playing tourneys try the Mag. Another good one in the same price range....Matrix?? Very fast, small, light...??
2K1 Angel LCD 68/45 Dynaflow
If you run, you will only die tired.