I have ran the trinity motors and also the Reedy Mini-Max and also the Speed 300, i like the Speed 300 because there so affordable.........The Reedy MM motor has higher topend but you can always tame it by gearing down.
On very tight tracks you will gain performance with just a simple 180 motor, it will give you more control of the car and so better laptimes.
I have seen a lot and trust me, the 180 motor is way faster in laptimes than a 300/6v motor. The only other choice to play with is a Graupner speed-300/7.2v