Give us a budget to work with for just the radio. Without servos or receivers. Since you have a JR now, do you have more than one receiver?

JR and Airtronics both are positive shift so their systems are compatible.

Futaba and Hitec are negative shift.

However many of the newer radios can select shift, so it it less of an issue.

Do you have $120 for a new radio? 150? $200 More?

Budget will determine your next step up.