Forum:DLC question, does it scale? Should I do Knoxx first?

Hello, I have a quick question - I am a big Borderlands fan - I played through when the game first came out, and then put it down. Now that the DLC is out, I know that the most recent one allows a level cap of 61. Should I do Knoxx first, and then do Dr. Ned and Moxxi? Do the first two DLC's scale? I don't want to trivialize them if they don't.

Any thoughts?