I lump technical cameras into three categories:
1. Larger cameras with more movements - Arca Rm3d, Sinar ArTec, Alpa Max, Cambo WDS, etc.
2. Smaller cameras with limited or no movements - Alpa TC/STC, Arca Rm2d, Cambo WRS, etc.
3. Hybrid LF cameras that some consider "technical cameras" but I don't. All of the Linhoff, and the remainder of the Silvestri, Sinar and Arca cameras. I just consider these LF cameras.
The first step in my choice was to narrow the selection down to one of the three groups. This is fairly easy to do just by handling the cameras and imagining the type of photography you do. You could arguably make this decision without taking a single photo. That's essentially what I did.
The second step is much more difficult and time-consuming. It can be tough to sample and test everything because one dealer probably doesn't carry all the brands, nor all the lenses / cameras within that brand. It took me four months of actual demo time to decide, and I bet that is faster than most. Most people buy a car faster than a technical camera!
Light weight and simplicity was important to me for various reasons, which is why I focused on group 2. I eventually chose an Alpa STC; I think Alpa has some great options in that group. The three primary options are the Alpa TC/STC, Arca Rm2d, and Cambo WRS. The choice between those three is a very personal one. In group 1 it really comes down to the ability to tilt on wide angles. If you want/need that feature, the Arca Rm3d is a stand-out in my opinion because tilt is built into the camera.
Dave