Have you considered using Wirsbo/Uponor's expander tool (and the corresponding PEX tubing)? The expansion fittings seem to be preferred by the pros. The tools also have great resale value, and you can easily find them used. The connections are really easy to make and they're rock solid. Uponor sells EP fittings, but their brass fittings seem to be really high quality, as well.
The Zurn Qpex stuff stocked at my Home Depot had (at least at one point) dezincification problems due to substandard brass coming from China. The problem fittings were produced several years ago, so I assume Zurn has probably solved the problem by now.