The 001/003 headphones do benefit from burn-in. I have a burned-in pair and a brand new pair with pehaps 10-15 hours on them; there is a clear and audible difference. Clarity, instrument separarion, and treble extension are all better on the burned-in version.
They're no match for the Lambdas overall, but the do a few things better specifically - bass impact and midrange quality.
Overall, a very musical set of phones. I think you'll like them a lot more with a few hours on them. Also, they're very source-dependant. They sounded rather poor with most mp3 players that I threw at them, but with vintage CD players, a good DAC or a full-size CDP, they shone.