If it were me I would go with Naim. I like my sound on the warmish side. I love my metas. In the price range not sure you could find better. Different but not better.

I am yet to dive into 'small monitor' speakers, mostily driven by the addition of a 18" sub to my main system (which led me to select 'small' for my full size front speakers in the receiver settings). Currently trying to audition teh LS50 Meta. I also have the Genelec G Three on my list. 

In both cases: can those single 5-7 inch drivers really move enough air to fill my huge (by volume, 2.5 stories high, open to easily 1000 ft2) with sufficent SPL? 

Who is using small speakers (with sub) in larger room (like LS3/5a, LS50, G Three, etc)? What is your opinion? 

I will say the metas are top notch for their size however you can’t defy the laws of physics. They will have spl limitations in larger rooms. If you can live with that then they will be hard to beat. If not plan to spend more for something bigger and as good as the metas otherwise. Adding a sub alone will help the lowest octaves if that matters. Using a crossover to roll off the low end from the metas and have a sub or subs pick that up can help push things further.

 

For reference I run metas with sub in a 12x12 room off a 150 w/ch amp and they are the best sound ever in there up to about 90db spl or so, which is about as loud as anyone who wants to preserve their ears should aspire to regularly. . After that they will start to show signs of strain/being overdriven.

The LS50 Meta + KC62 sub in a small room, 12x11x9, is incredible.

That same system in a much bigger room was nowhere close to what I am hearing in the smaller room.  The bigger room was 15 x 20 x 25 and opened up to another room.

I just got a MiniGaN 5 from Class D (from and is) and paired it with a Schiit Freya +. I just got it set up today to start breaking in the amp and am using my KEF LS50 Meta speakers and, gosh, I haven't heard them sound so good. There are trial periods for each of these. The reason I got them is a big thread on AudioCircle where a bunch of us are trying this and getting I think real quality for less than $2,000 (includes getting socket savers for the Freya and rolling the two gain tubes). But I also picked up the Freya + for a decent price used. Check out the thread at AudioCircle in the Spatial Audio Circle. A lot of nonbelievers converted. I'm agnostic but I may be drawn to the light.