What's your favorite boutique speaker maker

I would define 
<<The New 21st C Boutqiue Speaker>> 
Has  the xovers external, so you can see exactly what you are getting.
And the components are  from high tech labs, Like Mundorf, Miflex, Jenzen.
Drivers from Scandanavia, like SEAS, Scan Speaker and SB Acoustics. 
http://www.troelsgravesen.dk/Ellipticor-3.htm

Vapor Audio out of Missouri.. The Nimbus models are a true visual work of art and sound the part as well...

Please accept my vote for Magnepan. In my small house I pair 0.7s with a par of DWMs. Each DWM I wired the two 4 Ohm elements in series for 8 Ohms and connected the outputs of the Hammond 1642SE transformers as follows: 0.7 negative to zero, 0.7 positive to 4 Ohms, One DWM negative to 8 Ohms, same DWM positive to second DWM negative, second DWM positive to 16 Ohms. The 5 k primary of the output transformer to a heavy duty transmitter triode such as the 833A to easily drive it all. It is more than enough power and it sounds most like a live orchestra in the opera house I went to before the plague. Other Magnepans might be ideal in a bigger room.

Me!

I would add George Short of north creek music systems sadly he closed up his business. He moved on to Wisdom audio as chief designer. Over the life of north creek he sold thousands of kits ,fully built , crossover parts and licensing of designs to other manufacturers. I own his manifest speaker a very fine design . But he had many designs from floor standers to book shelf. Marc