Thanks to everyone for the warm welcomes and for the information!
I am in south east South Dakota, near Sioux City, Iowa. I would love to hear some of these rigs in action, but I have not noticed any posts from members in the area. It would be nice to demo a Jubilee/Jamboree set up to see how they sound with dance music and also to hear how the MWM (with no sub) does with material that includes significant amounts of information in the 35-40 hz range. I think hearing would make the decision easy, but that seems unlikely given my geography.
I am really only considering a fully horn-loaded 2 way system at this point. The efficiency and lower power requirements, as well as the more complex build are appealing. That being said, the added cost and complexity of a 3 way build are unappealing.
I agree that I have good flexibility with the setup. My wife and I are closing on a new house this summer and I get to have a dedicated space to work with. The size of the MWM is not a problem and I expect it would have more of a classic "club sound" for dance music. The LF extension is my main concern there, which leads me to wonder if anyone has thought about Levan-type extensions for the MWM or some other tweak for a longer path.
I have read repeatedly that the MWM HF extension is sufficient for pairing with the k402 and something like a TAD driver (~500 hz), even being a more limited HF than the Jubilee. If that is not the case, than that would be a huge concern.
My main concern with the Jubilee comes from the descriptions, mostly by MWM fans, of its sound as slower and possibly lacking some of the punch for dance music
Chris, thanks for your recommendations on REW or TrueRTA. I have not given much thought to the amps, crossovers, etc yet and this is where most of the range in cost will come from. It seems other members have had good luck with more plug and play with known settings for known equipment. I guess I plan to use that as a starting point?