Hi - just some feedback ... I bought the Raspberry Pi 3 with hifiberry Digi+ transformer version and hifiberry case.
The included spacers seem the right length for making the audio ports line up with the holes in the case. But then the Pi and Berry cards have to be aligned diagonal to each other in order to make the GPIO connection between them be fully inserted/flush. It's very noticeable, and doesn't seem very robust. You can only use two of the four included spacer posts, and it seems that the connection may loosen over time.
Either the case needs to be changed and the posts need to be shorter, or else the GPIO jumper/header connection between the boards needs to be longer/taller.