Speaker cone shape

Put a whole bunch of small...say 3"...full range drivers in an array of some sort that will move enough air to get to 85+ dB and be prepared at the amazing sound...with no crossover interference...that all these little drivers working in unison can create. 

Faital Pro makes some pretty killer little full range drivers for about $20 each.

Essentially the old Infinity. They had some good ... and some bad. I am a fan of midranges in this size. Not many really good. 

Well this has been interesting.  So though there is science involved and calculations to make, and I dare say the implementation of aspects of others previous design successes to assist with the design of a good speaker system, the bottom line is once you have done all that and built your speaker, suck it and see seems to be the final process.

I’m not sure what you mean by “suck it and see”. Your post was about cone shape. Good speaker design is full of challenges. But cone shape isn’t one of them. Buy what sounds best to you. 

What I meant by "suck it and see", is reading the posts, despite any science or past design experiments, be that of cone shape, cabinet or any other aspect of the speaker design, the bottom line seems to be you have no guarantee that it will sound any better to you than something put together in your garage out of available parts. You design it, build it, take all the available measurements, but it's not until you listen to it, do you find out how good or bad it is. Just like a new recipe, despite having all the best ingredients you don't know until you taste it. Add to that the fact that tastes in how speakers sound vary, along with all the other variables, and what you said becomes the deciding factor be they $$$ latest tech or not, if they sound good to you, they are good.