WANTED HEADPHONES and HEADPHONE AMPS

Looking for entry-level high end cans. Specifically Sennheiser HD-555's and 590's, Grado SR-60's and 80's, or any other decent models from AKG, Ultrasone, or Beyer dynamics. I'll also consider Shure and Etymotic Research IEM's if they are clean and in good condition.

As per amps, airheads/bitheads, total airheads/total bitheads, ldm+, or even a good quality cmoy (with a warranty of course).