I agree with Christian Tabush, quite exactly. I have run the LRP, the power is, well, incredible.
I also have GM 8T Delta ..also incredibly powerful
GM 5.5...with boost...very controllable at the bottom because its a 5.5, boost for the top end. Quite a good balance.
But often I just put the LRP in, but 5.5. I like it a lot, my favourite all round motor.
So again what Christian said is really correct. Choosing the correct motor for the conditions and your driving style is the key. There is no 'best' motor