I haven't noticed any issue at all with the "mismatch" of the DT and Maggie speakers. And the DT center is a LOT easier on the eyes (and space) than the Magnepan center or an extra MMG thrown in the center. My original plan was to just buy a half dozen MMGs and use them for everything, but it just seemed a bit overbearing in terms of the space taken up by speakers in the room and I liked the sound of the 1.6 over the MMG for the mains.
I'd always been told that the Maggies were really weak in the bass department, but I'm not finding that to be an issue at all. I've got the crossover set at 40hz and the gain on the LFM-1's set to between 2 and 3. That fills out things nicely in 2-channel mode (you don't really even realize the subs are there...which is perfect) and I still get floor shaking LFE for movies.
Cheers,
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