From your initial post:
"I am at an age where this opportunity won't likely be repeated and would like explore possibilities I likely would never have known about."
And from your second post:
"I have no experience in what role the design elements actually add or subtract if any."
Since it sounds like this quest is a major undertaking with high stakes, it might be worth a few hours of your time to dig into the topic of loudspeaker design. I'd like to suggest two first-class sources of information on the topic. The first is, "Premium Home Theater: Design and Construction", by Earl Geddes. This book is available as a free download. Don't be put off by the title - this is one of the best books on loudspeakers out there. Earl is one of the most intelligent people I have ever met (if not the most intelligent), and we are fortunate that loudspeakers are his passion. Just read the chapters that apply and ignore the ones on video systems and room construction, and you'll be the smartest guy in any room that doesn't contain Earl Geddes:
http://gedlee.azurewebsites.net/downloads/HT/Home_theater.pdf
My other recommendation is Floyd Toole's book, "Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms". This is arguably THE definitive work on the topic.
One of the other (or both) of these will be time well spent towards making this a particularly well-educated decision on your part.
Feel free to ask me questions, I'm not as smart as either of these guys but have been digging into their work for a good while now.
Duke