I'm not really a racer yet ;)
I have koni specials ( the red/orange ones - adjustable ) In the rear, set to firm with the pedders sportryder lowering springs and it's nice and firm, maybe too firm, but I like knowing that the back end will step out if i want it to.

I have koni specials for the front too, but they won't work in the 280zx struts so they are for sale, supposedly from a 200sz/gazelle, but they are the kind you have to take apart to adjust. The front will have the tokico 5 pos adjustable ones for the 280zx which are adjustable on the car.

KYB's even the stock ones are better than globriel and mushroe.

I have those 200sx koni's for sale and a set of front inserts for a B11.
both are NOS - never used.