running the AFP5-20 would be a good thing running a larger turbo than you need, It means u have more air than u need, which means u can be more conservative on the timing,and also your not trying to get every last horse out of a limited amount of air, u can just throw more air at the problem, which means overall it should prove more reliable. and also if engine is future proof you can just wind it up a notch
only issuse is lagg
imo if funds alow md321T. on a 2.5 is a wepon!!