Not sure what you mean by build quality of the SK7. It really is the mutts nuts of UW compasses. I'd be keen to see or hear of one that comes close.
It does sit higher than other compasses but that is because it is designed to allow for more tilt.
Compasses are not divided into Northern and southern hemisphere compasses but in to 5 zones and there are 3 that cover the southern hemisphere as can be seen by the image below. While they all point north, they do tilt off axis when used out of the designated zone and it is quite annoying. I have a console mount SK7 zone1 that I am more than willing to swap for a Zone 5 unit cash your way if anyone is keen!