well,seeing as darkphysics uses ageia's physx engine that is,in my opinion,the best physics engine out today,I would say its safe to assume darkphysics will be better than ngc+cloth and particles. Unless ngc can handle physics functions,or the cloth and particles pack can handle physics(like boxes falling,reacting to eachother,and they can float and what not). And as I said,darkphysics doesn't use ngc or the particle and cloth pack,it uses ageia's physx engine. So you only need the darkphysics tpc plug-in.
all ben needs is his band,his guitar,and his computer