You could use Zaino QD if that's what you already have. It will cut down on the dust a little better than a pure carnauba QD. I know someone who loves to use Z-8 over his Vintage and Royale.
I own most of the (popular QD's) around from Zaino to Zymol, OID, Sonus, 425 etc, and have use them all with both Swissvax and Zymol high end waxes and they all basically work the same for me.. jmo
If you want to use a carnauba spray with a carnauba wax, you can use Sonus carnauba QD. It's better priced than either Swissvax, or Zymol QD's. Chemical guys has a carnauba spray, but since I already had a ton of QD's I never bought it, but I hear it's pretty good.
Or you could always use FK425, or OID (no carnauba). These are the best bang for the buck price wise (they perform just as well as anything else really) and you can use these for more than just your vehicle.. I also dust my furniture, and plasma TV's with both of these products.
You can't really go wrong with any of them.
Good luck.