Once I build something as a test bed for what I want to achieve, get it working, etc then I do many things like directly wired drivers, quality wire, quality xover parts as needed and work on time alignment. I plan to use high grade materials for the baffles, etc... and proper construction methods.
I will take a good look at the different OB designs and likely build more than a couple, it will be great fun to do so and see what I can come up with that fits our very particular needs, which might not be OB unfortunately.
Not sure which I like better, OB or horns which I love done right and not at all done wrong.
I do have shielded dedicated lines to feed the system and moved the RV power connection to be away from it as well. I am looking into grounding solutions though I have metal skirting all around with at least twenty four one foot long spikes into the ground, all tied into the chassis of the RV thus breaker box, etc.
My computers are on a separate circuit and not tied to the audio system in any way.
I only run a wired ethernet setup, CAT6 cables for now, considering higher grade next phase of our remodel.
Acoustical treatments are critical and will do all I can in the confines of what we have to work with, I am very experienced in sound deadening of all sorts, from world class car audio competition systems to planning and implementing a very critical military installation.
Whatever speakers I end up running will be very well treated in all aspects to make them the best I can and all will be quite affordable:)
Rick