I love the Carpenters.
There is a guy out here, Charles Phoenix, who does presentations on retro stuff. He did a tour and presentation of the Carpenters' home town, and my friend and I went for the heck of it. We really enjoyed it.
I have a bunch of their regular and Christmas songs on my ipod, but top 5 for me would be:
Close to You
Please Mr. Postman
Top of the World
Christmas Waltz
We've Only Just Begun