What is a good all around high quality speaker to purchase?

I’ve owned and would recommend Devore, Proac, Verity, Harbeth, Reynaud to your mix. Owned a bunch of others many years ago like Vandersteen original 5, but they are out dated in sound for the practicality of owning them (extremely heavy). Old Wilson and Magico and B&W same category but if that older sound doesn’t matter, there is value there. Others like modern Klipsch are okay but they have the rigidity of a bathroom vanity from Home Depot if that matter. which it does.

I always suggest finding the kind of amp you can listen to over time and the speaker equal or second in some cases. Learn about efficiency and impedance curve to hone in on the amp and sound.

Again, most newer speaker manufacturers will have more live sound as they all come out with new products. If you haven't heard they buy something older, be happy.

i owned in the past Kef Ls50 which i believe are good bookshelf  speakers and I also heard the Mofi source point 888 for floor stander. price points are entry level and great sound. 

I also recommend considering Yamaha NS-5000.  Amazing tech, play big, deep bass, grand piano beautiful and Yamaha have kept the retail price the same $15k for 9 years since introduction in 2016.  You can find used for $10k.

I am pretty content with Caladans, but Steve Huff, who has listened to far more speakers that have I, seems to believe that O Audio's Icon 12 Speakers are about the best he has heard. Pure Audio Project also has some interesting speakers. Open baffle speakers have a different bass sound. They tend to have less slam, but most think that they are more accurate. That said, sound is personal. Even if you did like Bose, or very compromised speakers, you are not wrong. What you like is what you like, don't worry about what others think.

From personal experience I have found Totem and Nola speakers to be the most natural and musical while being the most forgiving of room dynamics.  They have great speakers that are less than $5000 but also make them over $10000.

I currently am using Totem Twin Bisons and they totally disappear into the sound stage.  Totem recommendations are to setup with the speakers firing straight a head for the best soundstage.  Which I have validated.  No getting anal about setting toe in, etc.

Just my experience which is worth nothing in the big picture