We try to camp as a family at least 3 times a year....all car camping since kids were added to the equation. I get out on a overnight canoe/camping trip at least once a year as well with college friends.
I just bought an Exped Megamat 10 Duo sleeping pad yesterday and I'm extremely excited about it. I've slept on them before and it's ridiculously comfortable, you can use them for company at home as well so it's not a completely stupid price point. Plus the old adage that you shouldn't cheap out on things between you and the ground (tires, matresses, shoes) is definitely in play as well.