I have questions as well... As already asked, Cam...you run yours with factory curves or programmed?
10mil, I can't argue with what you said. Since he already has it...so be it. I wouldn't spend the money on it when those funds could go towards more useful parts, or methanol and oil.
After owning your Dyna for 5 years...why haven't you taken the time to program it? Mat has a dyno, and you guys are buds, I'd honestly like to see what gains could be made by custom ignition tunes.
After going round and round with "Specialty plugs"...my take is this. Get the cheapest plug and run it. Spark is spark. There's no such thing as good spark, more spark, etc.
Now, resister vs. non-resistor is important.
I ran a Nology coil on my old bike. And to be honest, I did it for a few reasons. Quality, looks AND functionality.
The red leads looked killer, as did the braided ground straps. The only ignition problems I ever had was Ricky Stator, two of them. When I went back to stock, never an issue again.
BBP...you're going to get 10 different opinions if you ask 10 different people. Do what works for you....