DJC1000:
The radio you currently have will work fine. You will probably want to get the smallest receiver you can that's available. Weight is a very important consideration in park flyers. Micro servos are a must.

Keep in mind that a lot of park flyer radios are on the 27 mgz. band to prevent interfering with regular R/C flyers. You will have to check around to be certain that you will not "shoot down" someone else's plane when you are flying.

ECS are sized based on battery quantity and current draw. You will need to determine what power output you are going to be using to determine what ESC you will need.
Good luck,
Silversurfer