Hi Mabbs,
Sticks v Wheel - I think it's more down to personal preference.
To go to brushless you need a suitable speedo as well as the motor.
With the aerial I always make sure it's pulled straight and then try to twist the tube slowly as you insert the wire. Hope this helps!
It's difficult to say what to buy without knowing your budget. Should you need a speed controller I have one of the ones that Battle_axe linked to and it's been great, nice and compact with easy to replace wires.
For brushless, there are a variety of options, but again budget really comes into play here!
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