Capable 3 way Hifi LCR

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I've been browsing the various diy audio forums for years, and built several popular speakers. I have measurement equipment, some semblance of speaker design knowledge, and lately really been wanting to build my own.

I intend to build a set of LCR speakers for my basement theater with minimal compromises for sound quality(within reason anyways, money is still a consideration). My ears won't tolerate THX reference level. I consider max volume to be -5dB, and only for short durations of concert and action movie material.

Having owned and heard several pro driver based designs in the past which did not overly impress, I would like to avoid building any more speakers that require a furniture dolly to move.

Not set on all the details, but thinking about the following components:
SB29NRX75-8 - should have solid output and extension in small sealed box, hornresp thinks it should be good for at least 110dB at 1m
MR16P-8 - On sale and seems well regarded.
SB26ADC on Augerpro waveguide - Undecided on the highs. I already have a pair of these tweeters, though my 3d printer is still not operational.

Also considering something like the Peerless DFM-2535R00-08 on a shallow waveguide such as 18sound XT120, Faital STH100, or Celestion H1-7050.

I may try putting them in a baffle wall, or at least partial anyways. Quick sketchup of my general idea for the speaker form factor:

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I would really like some input on the viabilty of the selected drivers.
 

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The matter of choosing drivers is a personal and practical thing. Assuming sensitivity is right and the responses are overlapping well enough, the success is a matter of implementation. I would place the drivers on a single flat baffle, perform the phase corrections within electronics, passive or active, whatever you decide is more appealing.
 
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