Nikecb, you have chosen excellent drivers that will work well together. You are off to magnificent start, and you probably don't realize how rare this is. You see, many hardcore DIYers at some point decide that they are going to combine the best woofer with the best midrange and the best tweeter using the best crossover and the best enclosure, and they end up buying a bunch of very expensive drivers that do not work well together.
You are way ahead of the game already, but what lies ahead of you now are decisions that will make a major difference in the end results. The decisions you make at this stage will have far-reaching consequences.
Not that this is any of my beeswax, but if I were you nikecb, I'd hire johnk as a consultant on this project. There are only a handful of people out there who have the knowledge and experience to evaluate the various inevitable trade-off decisions you will be faced with in this particular situation, and John is one of them. And there are very few people who could design a woofer system worthy of your Goto drivers to cover the decade from 200 Hz to down to 20 Hz. Again, John is one of them.
I fancy myself something of a designer, but I'm not even going to make a suggestion for your 200 Hz to 20 Hz woofer system because John has the kind of experience with no-holds-barred high-efficiency wide bandwidth systems that would make his suggestions far better than mine. You don't need a bunch of well-intentioned pretty good suggestions - you need one or two excellent ones, and I don't want to dilute whatever John might have to say.
Duke
