What brand is the best for a commercial espresso machine… ?

You will absolutely love Kona coffee. There’s nothing like it – deep, rich, aromatic yet not bitter. I order mine from https://konaluna.com because I discovered gourmet stores usually sell blends, which are not as good. Pure Kona coffee works best for espresso.

I’d recommend Nemox, Jura, Rocket Cellini, Saeco, Rancilio, Gaggia, Astra, Andreja, or Paquini for a commercial quality espresso maker. Zaccardis.com offers all of these brands and can offer more information on each model. When it comes to choosing one, it’s all about what features you would like. I’d check them out if you’re looking into learning more or purchasing one.

http://zaccardis.com/commercial-espresso-machines.html

Hope this helps!