With your Radio Suggestion, MT44, given my son races a MT-S (similar radio), and I have my trusty 4PX, we have had a lot of success with the Protek Servos, such as the 160T, and the 170SBL, 170TBL. Also the MKS HBL550 has been super awesome, for the price and the ability to run anywhere from 6-8.4V , its a very versatile choice. Just make sure to take into account your ESC, and if it has adjustable BEC or not, this should further help determine what you will be able to power Servo wise.

Either way, there are many choices for a good deal, Power HD is on the come up, and from what I have used their servos are a steal. Just shy away from anything that may say hi torque or speed, yet is running Plastic or composite gears!