Honestly, that I'm sure will be all a dude really needs.
To answer your question on wear over time versus polishing, I do not think wear over time will quite end up with the same results as polishing. But being someone who has completely overhauled and polished myself, the difference is so nominal that it probably doesn't even make that much of a difference.
One thing you could add to your BSps order that would be a slight felt difference, is a reduced power trigger return spring.
In the end none of the springs really matter, the deciding factor for success is hours logged with gun in hand.
Cheers