I think most of the brands you mentioned have yet to release their e92 M3 products.
This is probably a topic that we should come back to in 6+ months. After the car is released in the US, and allowing the R&D for the brands above to produce quality products for the this new car.
Also, the life of your enjoyment of the car will most likely be substantially increased by holding off on modding until you've spent a good amount of time in the car with a stock setup.
I understand building something unique has it's own perks... but can you really argue that owning a M3 so early in it's production cycle is 'not' a unique experience? Regardless, at this point in time this is probably more of a topic for e46 M3, and e92/e90 forums.