Real leather pads are obviously the best. They are going to have the best seal against your head, and they will have the longest durability among pads. This is why they cost so much. Look at real leather jackets, you won't find one under 100 dollars, and likely for adult XL size, you'd be looking at 500 dollars. So leather is expensive, you get what you pay for. I know they cost as much as a headphone, but if you really care about your cans, and your cans are high quality, you'd be so nice to them to get them the top of the line pads. I bookmarked the link to the 50 dollar pads shared to me by olddude, eventually I want to get those but I will have to save up, cause it is a lot to dump into pads, and are low priority for me right now.
MGH24, you are hilarious man, see, your description is a perfect example of a guy who needs good isolation in his cans. So were talking closed back design hear, very important, especially while watching porn. :P And you want the real leather pads, the sheepskin. Then you won't hear a darn thing in the room, but your really going to hear your cans hehe WOOT WOOT :D