Of the 'phones up for discussion, I've only tried the D2000s, which are excellent headphones. But, based on your requirements, I can't recommend them.
When amped, the D2000s sound great, with well-extended highs and lows. I don't know if I'd call the bass muddy, but it's certainly a bit overwhelming. However, when I tried running these without an amp, I really thought they lost a lot of their sound quality. The extension was lost, and the bass really did become muddy and uncontrolled. The bottom line was that they really fell apart without good amplification.
I'll just throw this out there too: you might look into a pair of Ultrasones, such as the HFi 780s. I also had a pair of these before, and I thought they sounded quite good both with and without an amp.