Re: Best starting place
Buy a 40mm stroke bottom end from MotorBicycleRacing or Dax for the best bottom end.
Neil's (MotorBicycleRacing) cost a bit less. PM him for details.
I love my "GenV" engine which is based on the longer stroke crank.
They have a better "balanced" crank from the factory.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.