I need help picking a MMP combo. mostly going to do parking lots , in fron tof the house, and probably some speed runs.

Which ones do you recommened.

MMP 5700
MMP 6900
MMP 7700

this is the only thing im missing to get my TC5R started.

so far i bought:

1-venom 7.4v 5000mah lipo 50c
2-triton2 eq charger

any help would be great .