I had the LS50 for a decade and recently got the LS50 Meta. What a speaker, so much better than the LS50. More clarity, detail. and the speaker disappears better. I have it hooked up to KEF KC62 sub which I have raised off the floor on a bar stool. Now I have not compared it to the sub on the floor. It sounds too good, and I am lazy to do so.
My room is not too big, 12x 11 x 9. I think this is the ideal sized room for the LS50. I had the Thiel CS3.7 in this same room before the LS50 Meta, The Meta is a much better fit in this room. I did have the CS3.7 working fatigue free in the room. The smaller Meta + sub just fits and sounds better in this space.
I was going to get the Yamaha NS3000 monitor from Canada because I love the bigger NS5000. The NS3000 is about $9K USD. I got the LS50 Meta first because the old LS50 got damaged, and I always want a LS50 around.
The level of quality I heard on the LS50 Meta + KC62 sub made me forget about buying anything else for this room.
The only time I was disappointed with the LS50 Meta was one day when I listened the whole day while working deep on a project. At the end of the day, I was thinking the magic is gone with the LS50 Meta. Maybe I need to revisit the NS3000 idea, I found out that I had turned off the sub the prior night when I was listening to some headphones on my 2-channel gear. Turned the sub back on (wirelessly) and the magic was back.
Do not let the relatively low-cost fool you. The LS50 Meta and KC62 sub in a small room is reference level sound. I use Benchmark AHB2 monos on the speakers.