Most "Veterans" consider any radio other than an M11 or KO or whatever their favorite high end radio is to be a toy. In the past this was very true. Today we have some very nice budget radios. As long as it works trouble free for you, switching is unlikely to improve your laptimes or enjoyment.
Now upgrading servos can definitely improve enjoyment (by not dying) and laptimes if yours are too slow. I can't stand a slow throttle servo.
If you are dead set on switching I would go M11 with Futaba digital servos.