The La Marzocco GS3 is an aspirational high-level professional machine, that can be for home. I have a friend who put her GS3 in a Horse Box and made coffee at events, very successfully.
In terms of specification,
The GS3 is a true double boiler machine, handmade in Florence. See the brochure HERE
You can go for pressure profiling or you can use programmed buttons, referred to as “Volumetrics” in the trade. If you “Just want to make great coffee” Volumetrics is for you. If you want to be experimental and push coffee boundaries, pressure profiling is for you.
How do you want it?
You can have your GS3 as a standard stainless steel machine or you can upgrade and have glass sides or custom colours or even wood. If you would like to talk upgrades, email; firstname.lastname@example.org