Any boosted E9x M3 should make a ridiculous amount of power. It will be interesting to see what is available in 2-3 years, maybe over 550whp.
IIRC, the first s/c kits for the E46 M3 were just over 330 whp. It took 3-4 years after the E46 M3 debut to break the 500hp barrier.
I can't wait to see this kit completed!
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red