My winter project is going to be a Direct Connection 1.20 Ultimate. I will be installing the 60" WS option. The plane will weigh 10 - 11 lbs. and have a YS 1.20sf. I am now trying to decide on the servo setup. I plan on using 2 aileron serv

This is what I am now considering:

6V battery
Throttle: 1 - Futaba S3101 Servo Micro Precision
Rudder: 1 - Hitec HS-5625MG Digital
Ailerons: 2 - Futaba S9001 Coreless or Hitec HS-5475HB Digitals
Elevator: 2 - Futaba S9001 Coreless or Hitec HS-5475HB Digitals

The decision I am trying to make are:
Futaba S9001 Coreless or Hitec HS-5475HB Digitals?
NiCad or NiMh?
What size Battery?

Any information or suggestions would be appreciated.