Don't know where you guys are buying your NY strips, but I get mine at what WAS a mom and pop store that now has a chain of 11 stores throughout RI, and they are always tender, and far more flavorful than filet mignon ...
Always salt and pepper the steak - no matter what cut you are using - and let it rest out of the fridge for about an hour before GRILLING ! ... I don't care what the outdoor temp is, a steak has to be GRILLED ! Gas, charcoal, or hardwood u don't care... A little coating of olive oil or butter before placing on the grill and you are good to go ...
One last thing, PLEASE don't freeze a good steak ... Just buy it the same day or the day before you are going to cook it ...