Louis Armstrong on Mosaic

[Chanders]

Hi all, I am more or less a lurker on this board but have found it very valuable especially as it offers a different take on a lot of aspects of recorded jazz than my usual forums (Reddit and the one that shall not be named but if inder the banner of a well-known engineer). 
 

I’ve been building up my Mosaic collection the last year or so and it’s time to combine that with the goal of broadening my Louis Armstrong holdings past 1934. I have the complete Hot Fives and Sevens of course and the Portrait of the Artist sampler box. If you were going to pick your first of the four main Mosaic boxes which would you start with? Let’s assume for the sake of argument you might not ever have the money or room to get another. Finally, all of the boxes are OOP and expensive but let’s just ignore that for now. 
 

Whar would you buy first?