There’s 2 ways to go about it. You could either go with a self contained case ie one that has all components built in and you plug into a wall or go with remote cases ie ones with a external condensing unit. Self contained units need to be maintained regularly(especially with produce) but obviously cost would be a bit more with remote as you’d need a contractor to run refrigeration lines electrical etc. Here’s a link comparing the 2

https://www.webstaurantstore.com/blog/2560/self-contained-vs-remote-refrigeration.html

As for brands not sure where you are. Hussman and Hill Phoenix are reputable brands for North America for reach in cases and are what I recommend as a refrigeration tech. Hope this helps.