On Cquartz I really like ReLoad. And because they are the same base tech. it helps to amp up the gloss and slickness.
For a more temporary slickness I have used DG Aquawax, FK425, OCW, and the new ONRWW for a quick wash top up with out the extra work.
I just got Sonax Polymer Net Shield to try on top of OG to help the water spotting issues. So we will see...