If you want the best out of the box performance, go with the zeus, as the muzzle velocity is around 100 feet per second, were as the others tend to be around 70 FPS. However, loading the zeus is a bit slower (although tons of fun), and the magazine only holds 12 rounds, and you can't get a bigger or smaller one for it. Also, because it is part of a new line of blasters, it is not compatible with all the old darts, but if you buy more (which I did) it is not that big of a deal. The main problem is that because of the flywheel motors that it uses, the batteries die off pretty quickly, but you can still spend 2 days non-stop nerfing with out having to change them. The ergonomics of it are superb, it is semi-automatic, and all in all it is one of my favorite blasters to use in un-modified form, I highly recommend it. Because of how it carries the batteries, it is also very well balanced.