Speaker companies with a focus on parts quality and measurements

To answer your original question about "public measurements", besides the two companies you already know about, the only other I know of that does that is Salk.

Toole and Olive’s philosophy at Harman is that people prefer flat FR, so between their designs and DBT process, Revels usually measure very flat. As do PSB. Many studio monitors (i.e. Mackie HR) measure very flat. Technics’ new bookshelves measure fairly flat up to 7kHz and their off-axis graph is very good (Stereophile - Class A 2016). Only handle 50 watts though.

Stereophile and SoundStageNetwork show the FR graphs of many of the speakers recommended above as being all over the place. On- and off-axis smoothness is one of the key features I look for in cone speakers. But then again, some people prefer a colored sound. However, my philosophy is that if you start from flat you can more easily tweak the EQ to suit your needs.

Not true that at this price he can't get custom drivers and high quality parts - check out Vandersteen VLR
they go pretty low for a small bookshelf

I suggest you have a look at Tekton speakers. They are renowned for using quality parts and have had some excellent reviews.

To answer some question:

I haven't heard any of these speakers, nor do I have any way of auditioning any of them. I'm in the midwest and would have to drive 3 hours to Chicago to find the nearest high end audio shop, and they still wouldn't have most of the speakers I wanted to listen to.

Currently running off a Yamaha RX-A1060 receiver, but I'm probably going to swap that out for an Emotiva XPA Gen3 and either an Emotiva XSP-1 or Parasound Halo 5 pre. I'd use my RME ADI-2 Pro as my DAC. Everything I look for in audio, whether recording or playback, is reference ruler flat response, detail, and clarity. Not looking for 'musical' speakers. Low end extension isnt a concern since ill be using a crossover with my F15HP sub.

Based on all of your suggestions and reading lots of reviews, I feel like I've narrowed my search a bit.

Ascend Sierra 2 - $1300
Revel M106 - $1350
PMC DB1 Gold - $~1300
Vandersteen VLR - $1275

Some that I've decided against
Philharmonitor - I feel that they are so similar to the sierra 2, but based on reviews I would probably go with the sierra for a planar tweeter speaker.
Monitor 100 - Too expensive
Amphion One18 - Too expensive

Again, really appreciate all the suggestions here. I've found a lot of companies that I'd never even heard of.

In case anyone is interested, I ended up getting a used pair of scansonic mb-1. Might also order the Sierra-2 and compare them.