I'm about to drop an order with High Order pickups and I'm wondering whether to opt for the nickel covers or not. It's a cosmetic thing mostly, but i'm wondering just HOW it'll change the sound. obviously pickup makers use them, so i'm sure they don't TOTALLY change the sound, but still. i've never used covered pickups so i don't have much reference. Will they mellow the sound out a lot? What do you all say?