Any servo without the "Futaba tab" on it's connector will plug into a JR radio and work. I use Hitec servos all the time because they usually are lighter for the same power output and have worked very well for me. And their universal connector works with every kind of RX or plug. Hitec also has a good switch harness. They also have a wide range of servos available, and usually are priced a couple of dollars less.

Their HS55 is one of the best for small electrics (and is only $14).
The HS81 is one of the best for gliders and smaller power planes (and is only $18).
Thier HS225 is about the best of that size and is about the most powerful in that size (and is about $21).
And they have 3 or 4 standard size that are about a tenth of an ounce or so lighter than most standards (and range from $9-$15).... although I usually blow off using standard size servos and use the HS225 and save about a HALF OUNCE per servo and have the same power as a standard.