Thanks Danny and everyone else for the input. Was not aware that the Neo's are so finicky! Definitely sounds like an in-depth project that could take a while, with dubious results without having a really good chamber to measure/test them in. Hmm. Was planning on implementing a digital crossover with my Metric Halo ULN-8 interface, which has quite nice converters as well, obviating the need for designing a quality passive crossover (which is way over my head at this point).
And then I was going to CAD-design the baffle and get it CNC'ed at a local woodshop. (Good point, j, RE starting with MDF before wasting hundreds on plyboo!)
But anyway, given the difficulty, may wait a while on this project. I built the Super V's totally at the wrong time in my life -- not in a living situation with a space that can do them justice, so I'm using near-field monitors for the time being. Perhaps I will hold onto the Super V's until I get into a better space and can really audition them closer to their potential. Have never actually heard a Super V in a good room, so it may just be that I don't know what I'm missing.

Main idea is to use my nearfield monitors for most mixing duties (they're exceedingly accurate but don't have much bass), and bigger/ballsier speakers for tracking (like the Super V).
Oh and thanks, Danny, for the note about a possible deal on the Super 7. If/when I'm ready to spend $10-15k+ on a speaker, I might send you a PM!
Also interesting to hear your thoughts, Danny, on the RAAL. I've read in multiple places that people pick the RAAL over the Neo3. What about the RAAL 140-15d in open baffle? Any experience with that one?
Actually, Danny, you designed the crossover on the Tyler D1's, right? What's your opinion on those versus the Super V's? Having never heard either of them set up properly in a good room, all I have to go on is reviews, but I know of a couple mastering guys using the D1's and they seem very well regarded. Would one make a better mixing/mastering speaker than the other? Or apples to oranges?