I marinate mine in this simple marinade for about 20 min, doesn't need longer than that to sit and it makes them really nice and moist.
You can make additional marinade if you need it, this one usually is good for about 6 pork chops
* 3 tablespoons red wine vinegar
* 1/3 cup extra-virgin olive oil
* 2 cloves garlic, chopped
* 1/4 to 1/2 teaspoon crushed red pepper flakes
* 1 tablespoon chopped fresh thyme leaves, a few sprigs
* 1 tablespoon chopped parsley leaves, half a palm full