Unsure on case right along with some parts. At the moment I have a R3 3300x and 2x 8gb 3200mhz sticks. I'm looking at getting a motherboard next.
Which use you will do with this sff?
For the case is important the GPU, if you will be use a MINI GPU or a Standard GPU.
The motherboard, i don't know your budget but if you can a x570 chipset is the best, and in the future you have fully easy support to Ryzen 4