For people getting started on hybrids who want a easy transition HyperTech is what I would advise. They are easy to use but again I think they are designed to be simple. I must say Skyripper and Contrail in the low ranges (under 75mm) are designed for a more complicated build.
I would have to say that I completely disagree with you Wayne. I cannot comment on Contrail hybrids as I have never seen one let alone flown one, however I do own and have flown 38mm Skyripper hybrids, and I have to say they are a doddle. The nozzle and injector are the same across the range, unlike the multiple injector orifices with the Hypertek stuff. Assembly is very simple and the GSE requirements are as basic as you can get, not to mention they are fairly inexpensive. I also own a Hypertek motor which I have not flown yet because of the added complications and equipment associated with flying it.
I reckon Rob is on the money going with either a Skyripper or Rattworks hybrid.