need new rear springs

when I bought my car it sat pretty low in the rear, found that it had air shocks so I pumped it up a little. I like the look, but Im not a fan of air shocks, nor do I trust them. so I basically need new rear springs as mine are flat lol.

anyone have any recommended springs for me? how are the mopar superstock springs ridewise? the car Will be seeing some track time but is mostly a street car. it currently has a 8 1/4 in it, but Im putting a 8 3/4 in it over the winter hopefully (need to clean up the 8 3/4 I got and change all the internals etc) if I have the time. car is feels around 300hp right now, im planning on intake manifold (has stocker), headers, exhaust, cutouts, torque converter, possibly nitrous/new heads/cam. nothing crazy.