Best Amplifier & Speakers combo?

I would offer two suggestions.  1-Take the LS50 over the Q series, noticeable bump up in SQ IMO.  Both of my kids bought used LS50s and are very pleased. 2-The non-Meta KEF R3s are being discounted now and should be a strong consideration.  They will sound a bit fuller than the much smaller LS50s since they have a dedicated bass driver.  I'm sure they will do better with a bit more power which can be an upgrade down the line.  Good luck and cheers.  

I vote for the LS50 as well, but I am biased because I have them. However, I recommend you broaden your amplifier search to find a bit more power. Even at lower volumes the LS50’s benefit from an amplifier with some depth. 

The LS50 Meta is a great speaker. In my room, it was much better than the LS50. Even in a small room, the KEF KC62 sub makes the LS50 Meta a homerun. Without the sub the bottom end is lacking.

The better the amplification on the LS50 Meta the better the sound. I tried the LS50 Meta with the CODA #16, Benchmark AHB2, PeachTree GAN1 (modded), and a few others. The more power the better and the quality of amp will also show through.

I recently got the Magnepan LRS+ for my office and I "think" it is better long term than the LS50 Meta. I use the LRS+ also with the KEF KC62 but it is not as essential with the LRS+. I have my LS50 Meta for sale now since I am lacking space to put it, but I may change my mind and alternate with the LRS+.

My room is 12 x 11 x 9 with 4 extra feet where I took out the closet door and stuffed my desk and computer monitors. This seems like the ideal sized room for the LS50 Meta and LRS+.

BTW - I am getting a PeachTree GAN400 amp ($2K) coming today for my LRS+. I have a feeling it would be great with the LS50 Meta and work with the LRS+. Maybe not as good as the modded Peachtree GAN1 I have but the GAN1 would not work for you.