Distributor: Single Point vs Dual vs with Pertronix vs....

Not really.
Single point won't have the high rpm dwell time of a dual point. If your drag racing, dual point is better.
A cheap replacement distributor won't have the same timing curve. Having the correct timing is more important for good combustion, power and efficiency than all the other factors.
Keep in mind this is part of my Get Running & Driving thread. The motor is an unknown. If I put a bunch of cash into accessories only to find out the motor needs a rebuild, then I might need a new direction. I'm in discovery mode, so probably answering my own question. Just need enough now to get everything running to evaluate the full drive train package.