I've had disc and moggies , but i prefer disc because in my opinion they are so much better , but they can work terrible if you set the up crap , my discs are set up really good now and i haven't had any problems apart from bending the front rotor a few times.
But then again you dont have to worry about swapping pads , grinding rims , buying new rims ect like maguras.
Just go double disc.