For a basic trainer kit, I always get a kick out of what the reviewers use for radios and engines.

Kit Equipment Specifications vs. Equipment used for Test Kit.

Engine Req. - Simple 2 cycle .25 to .46
Engine Used - Dual BB ABC BX Supercharged 4 cyl. with twin carbs, pump, and aluminum headers.

Radio Req. - Simple 4 channel (R,E,T,A)
Radio used - 21 channel multiplex digital PCM/PPM/PPF/BroadBand with synthesized tuning and pre-programmable logic cards, 128 GB of RAM, and 8 featherlight digital brass gear reductioned servos powered by a ion-lithium / hydorgenic cell.

Just the perfect set-up for the begginer who's on a limited budget