What speaker could safely be ordered without hearing it first?

Kind of really depends on what you like and want.  It looks like you have a low-power amplifier.  Do you want to play softrly to medium or get loud?

For the former, Monitor Audio and Fritz are good bets, for the latter perhaps Klipsch Heresy's.

@stuartk

+1 …. Big time.

This wistful fast ‘n dirty blind shortcut approach to select your speakers is a fast roadmap to falling into component flipping purgatory. Synergy (or lack of it ….) matters …, full stop.

More so, your added qualifier of “safely” in the context of a blind purchase renders any meaningful response from the forum public impossible .

note: Enthusiasts can fall into the trap of ignoring key principles.

example: 

Audio - amps and source vs speakers 

The philosophy is clear. An affordable speaker with decent amplification (and source) makes more sense than an expensive speaker with a cheap amp (and source) 

(hint: this is a journey and not a destination.) There is no substitute or shortcut for rolling up your sleeves, and conducting personal auditions and including some key advice from a dealer.

choose wisely.

I think this is a relevant thread since reputable dealers are disappearing and fewer and fewer of us have access to good dealers/equipment within a reasonable distance.  There are speakers that walk that fine line between detail and musicality that I call “straight down the fairway” speakers that are probably pretty safe bets buying blind if you have to go that route.  Joseph Audio is one that the OP mentioned, and I’ll add ProAc and Usher.  Hard to see anyone being unhappy with any of these wonderful all-around speakers. 

I have the same problem. I am interested in some speakers that weigh 230lbs each, cost a lot (to me) and there are very few (1-2 dealers within the USA). There is no way to audition them at home. I may be able to audition them in a few months when the importer gets more, but I would have to take an expensive plane trip and there will be a $10,00 price increase looming if I wait.

Yikes!

ozzy

Auditioning speakers is often not an option for a lot of people, hence their dependence on reviews. But unless you can hear them in your room in your system, it's always going to be a bit of a gamble....Something might sound great at a dealer and not so great in your environment.