Kind of depends on what your definition of "best" is, IMO.
If you just want to get out of changing points and keep a nearly-stock look, then the Pertronix is probably best.
If your dizzy is a little worn but you want to limp along with it for a few more years, then one of the optical trigger units (like the Crane XR700) is probably better.
And so on all the way up to the distributor-less system Shannon mentioned.
One interesting concept is at
https://www.starchak.ca/tech/pdfs/hitachi.pdf
Unless the DIS systems have come down a lot in price by then, my plan for my next "fast road" motor is an optical trigger (Crane XR700) firing a MSD6 box. My experience is that the MSD6 brings some problems of it's own (mostly a tendency to toast any high voltage component that's marginal), but I've otherwise been very happy with the (point-triggered) unit on my TR3A.
BTW, IMO none of these are going to increase power on a stock engine, when compared to the original setup in good condition (and perhaps recurved for modern fuels). The stock motor just isn't that hard to light off, so increased spark energy does nothing. Any improvement is going to be in places like easier starts, and more tolerance of worn-out components. If you're just looking for more "go fast", your money would be better spent on cam & compression first.