FWIW, all of the options you mentioned will shorten the life of your OEM dampers as they're valved for the OEM springs (under-damped I would say unfortunately). Generally, the lower you go, the faster they're going to wear.
For a height reference, I have RCE blacks on the GTWorx Bilsteins, but I think the springs gave me a drop closer to 1" than .75". Any way you look at it, once you pick springs, you should probably start putting money aside for new dampers. There are 3 good options. The Koni Inserts, Feal Revalve, and GTWorx.