What speaker could safely be ordered without hearing it first?

You can't go wrong with Wharfedale Linton speakers for the money $1499 with stands in which I highly recommend. The bass is good without exaggeration , the mid-range is great and the high end doesn't give me listener fatigue. If you buy them new.....give 'em 200+ hours to break in to get the richest sound. These Lintons are in my second stereo system and I really like 'em !

If skeptical, you can always return them to Crutchfield for a nominal price within their 60 day return period.

Tidal speakers ....

What a great read through all the comments.  I downsized this something from Von Schweikert VR 5SEs to Silverline 20s with subs and then upgraded to Wilson Benesch Discovery ii this week.   I bought my Von Schwiekerts on reviews and found they were great speakers, but not in my small room.  I heard the Silverlines in a small room and was floored at the cost vs sound quality.  I then happened upon the WB Discovery ii and heard them in a big room and took the a chance that they would offer enough bass for my room.  So far so good, I would suggest WB, possibly Endevours, for a full room such as yours.  Happy listening.

Even with a manufacturer with a stellar reputation there is the room size, acoustics and supporting system to match with.

Not easy to do if you have demanding preferences.  

Magico S2 or S3 Mk II or later, S5 if available.
I recently replaced a twenty year old pair of (upgraded) Monitor Audio RS-8s with a pair of Magico S5s. Bought second hand sight unseen, with no audition possible without incurring a trip to the other end of the country.

Reproduction and enjoyment are next level, there is no comparison. As expected given the cost.

Finish is superb, mine are sand blast anodized. New model finishes are also amazing, sadly out of my price range.

Your L-509X looks to be well engineered and its intimate, dynamic sound should complement the Magico’s well.

Nice table btw, did you make it?