I've run my 2812s on the street for 20k+ miles before I rebuilt them. They are GREAT on the street. But I did have them originally built with the standard kits, not the fragile low-drag kits.
I'm almost finished with a new aluminum bodied Bilstein shock for the NA/NB Miata. It's a non-adjustable that I'm making in two versions. A street shock that won't fall on it's face on the track with 600/350 springs and a competition shock with stiffer springs.