IMHO no LSP will prevent marring. Marring is prevented by how one handles the vehicles surface. For example, if you use a poor washing technique, you will mar even a hard LSP like Klasse or Zaino.
Dust is a result, in most cases, of environmental conditions. Spring - pollen, US southwest - dust storms and dry conditions, Northeast and California - pollution fall-out. No LSP will overcome these factors.
I find that using towels that have low to no static electricity on my vehicle surfaces when buffing out a LSP creates a less attracting of dust vehicle finish. Even products like Souveran do quite well in my garage (vacuumed often and low traffic area).
Go with a LSP that gives you the look you love, protect to your needs and just live with that fact that black will show any dust that may settle on it. There are products out there that claim "anti-static" properties and ingredients and some work pretty well to neutralize surface static. But as I mentioned they too fail at negating environmentally caused dusting.
Do not let this dust-less quest entice you to chase for a cure by constantly Cali dusting or QD'ing. This quest "will" lead to surface marring and

.
Try Scotts recommendation of Meg #16, he now has the headache of maintaining a black vehicle.

I have had great luck with Klasse and Zaino products with outdoor dust "reduction" and complete elimination of the problem with bi-monthly driven black garage queen. I use MF's towels that have had time to de-magnetize for all buffing and QD'ing activity.
Hope this helps.
:wavey