Depending upon where you fly, the single conversion receivers can be problematic. I have, however, used the $25 GWS R4-P single conversion receiver in many successful applications.

To get the best performance with the least amount of weight, it may be worth investing $55 in an M5 sub-micro receiver from FMA Direct.

The M5 packs a sophisticated microcontroller and advanced dual conversion circuitry into a very small package and weighs only a mere 0.3 oz (9 gm). The M5 is perfect for indoor, backyard and park fliers; however, the performance and reliability of this new full performance, full range design enable it to be used in any size airplane at any flying field, even with multiple flyers in the air.

The M5 is a full range, dual conversion receiver.

Good luck!