One other thing is that you mentioned going electric for convenience. Electric has improved dramatically over the last few years so it is an option on just about any airplane you could want to fly. The downshot is that it costs more for the same amount of power, and you have to wait for batteries to charge between flights. If you decide to go electric in the classic .40 sized trainer, figure $150-$200 extra for the power system and another $100-$150 for a full-featured battery charger.