Opinions about replacing points with electronic module

[Metalaroundstone]

I would like to hear some opinions about replacing points with an electronic module that fits in the OEM distributor. I have heard good things about the Pertronix Ignitor (shown here). They seem a little pricey though. They are over a $100. Does anyone out there have any experience with these or a similar setup. Does it make that big of difference in the performance of the engine? Better starting? Better idle? Cleaner burn/less smell? Are they worth the money? Do plug wires and/or distributor cap need to be replaced to get any benefit?

My 66 truck has the original 327. I am trying to keep it looking stock so I don't want to go with a full HEI distributor.

Thanks