What speaker could safely be ordered without hearing it first?

Stealthcraft Mute Specials.

Never buy speakers without listening first.  Nor any other component.

If safe is your goal in both performance and budget (and checking out your room) the latest generation of Mission 770 or Wharfedale Heritage line big baffles are well made MidFi all-rounders. I confess to being a fan of the Peter Comeau IAG designs. This company doesn’t get much play among golden ear audiophiles but the products they’re producing under the English brands they now own are selling very well worldwide for a reason. Wharfedale Heritage Lintons are amazingly musical at any volume.in my high current Mogami cabled system for less than $1.5k for the pair. Took about 100 hours of listening, some DAC tweaking and interconnect clean up but they have exceeded expectations.

As you have a Luxman amp, send them an email asking what they suggest...

The correct answer is "none".

Take Klipsch, Quad, Magnepan, & KEF - all with 50+ years longevity, loads of admirers here, radically different approaches, sounds, amplification needs, optimal room locations...

Or Infinity, Genesis, Thiel, Vandersteen, Linkwitz, Wilson - visionary creations of legendary designers with dramatically different & different sounding products.

There are many, many reputable speaker makers out there.  Your question is not frivolous, but the only "safe" general answer is to confine your choices to the speakers that you've already heard.

However, the more context you give, the more likely folks here can give you specific suggestions of speakers to track down & hear before deciding.

+1 petaluman. Never buy any hi fi product without listening to it first - preferably in one's own system.