no, i did not mean that u spend higher to buyer a better. if u can afford under HK$1500.00, u can buy the mid-high level control system. As the other ching said:
GT3B $3XX,
3PL $7XX,
4PL $13XX,兩接收版$15XX
MT4 $13XX,兩接收版$15XX
that depends on your favourite.