It's possible they are not warping but instead you are feeling vibrations from inconsistently bedded pad material. I'd suggest following a proper bedding plan next rotor change.
You should also measure for runout. If it is too much you will keep warping rotors, nomatter how good of ones you get. Need to clean hub really well and make sure lugs properly torqued.
Are these the ones that have to be assembled onto the hubs? If so the hubs must be spotless. After assembly they need to be cut on a brake lathe as the hub flange is not always perfect. Also lug nut tq is very important here.
I just put Centric on my daughters 05 Equinox and really like them. Also just put a Centric front hub assembly on it.
They are very quiet with no fade or pulsing with minimal dusting. Got them off Rock Auto.
Good Luck.