Now that the forums are back and I've had some time to listen to them, have to say whilst the soundstage of the 806 is indeed very wide, it has what I read about in a few reddit comments, that it is "floaty" - Didn't understand it at first before hearing them but it's the kind of presentation I can never get used to because for me it is nearly nauseating. Vocals especially. It's a similar effect to
Acoustic Mirror effect used in various things all around the world.
Love the textured satin finish of the cabinet though, and it's only a fraction shorter in depth than the Q300. Also really like the driver cone pattern, a really cool design.
I also could not get the banana plug caps off which is bizarre. Reviewers also mentioned this but was able to use banana plugs anyway as unscrewing the terminal the stem itself has a hole to push the banana plug through then screw lock in place.
Anyway, in terms of bass, it seemed fine but strangely, even though the driver is the same size as the Q300, the depth and detail just wasn't as clear as the Q300. I imagine but this is something that usually tails out after break-in so I didn't focus on that. It was the stereo imaging that really bothered me and something that doesn't change much at all after break-in and it is clear these are not for nearfield usage. I think I can safely say that coaxial speakers are the only option for any upgrade path. The Uni-Q tweeter Kef use places vocals absolutely perfectly regardless of where I sit/stand in the room and everything feels "live" and surrounds me.
So the LS50 Meta were too lacking in bass due to smaller driver and cabinet, otherwise they'd have been good but I didn't feel they felt like £1000 speakers vs the Q300 either as a result, and /needing/ a sub with those is out the question as that's more cost which IMO is unnecessary given the Q300 does it without one.
So I guess it ultimately comes down to just keeping the Q350s until I'm prepared to pay big bucks to get a noticeable uplift in sonics to actually feel like an upgrade without sacrificing what I like most about the way the Q300s deliver sound!