Thanks for the impressions. Based on the relatively few FRs I've seen of the Shape 65, they seem very similar to the Aria 906 - maybe a bit flatter in the low and mids, hard to tell as the scales aren't the same and different places doing those measurements, but they so seen to retain a gradual roll off of the treble that the Aria does. To me, I find that a very smooth sound and not bright at all. I found the LS50s bright and harsh, and the Arias nice and smooth. The ELAC DBRs I'm currently testing are definitely on the warmer side, which seems to recess the highs a bit and I feel like I'm missing the... Forward neutrality of the Focal, if that makes sense? I've always heard the Focal house sound being described as that, while being smooth. At least, my experience with 906 is accurate for that, and the Shapes seem to use the same flax drivers and aluminium-magnesium tweeter setup.
So I'm hoping if I end up trying the 65s they'll invoke a similar feeling (it seems they do go down lower - 55Hz Vs 40H - but this can be attenuated from the speaker itself so no issues there) while also simplifying my near field set-up.
Regarding the heat thing: the twins have an extra amp in there for the additional woofer, so it may be that one is more prone to getting too hot with that enclosure design. It was the last released in the series, after all. Just food for thought.