Hey!
First off Good Luck like many have passed along to you already....I own an Ambex and are extremely happy with it...went down to Florida a couple years back and really enjoyed the whole operation of them....Mine is a 30 Kilo, but I did see the smaller ones in action and really enjoyed...
For American Coffee I have always used Bunn and they have good stuff and decent service with ok pricing.As far as Espresso....there are so many options to go with...I'll say Faema or La Cimbali for Espresso machine and Mazzer for Grinder..That's just my two cents...
I supply Coffee & Espresso to many New York City, it has a great coffee culture. It Sounds like you are doing your homework, and plans are in motion!
Good luck in your adventures .
Aldo
Nicoletti Coffee
A Starbucks opened up across the avenue from a coffee house that I provide coffee and espresso to. After two years the Starbucks has closed and then local coffee house is doing well.