Servo is an easy choics, Savox 1258, I really like the black edition for a few more $.
Radio is up to your budget.
Spektrum DX3R Pro or DX4R Pro: radios are fairly cheap and receivers are super cheap.
Airtronics MT4S: radio is a lil more expensive and receivers are way more expensive.
Any of the Futabas: radio is way more expensive and receivers are a bit more expensive.
Spektrum being the comparison point to the rest.