What on the audiophile series is the best value? Price range is $200-$300. Amazon prices, not Sennheiser website prices. I'll be using a Bellari HA 540 amp to push them.
Sennheiser 600s are great, even though it's $15 above your price range.
Not many Sennheiser headphones between $200-$300.
Maybe you can try something like some AKG K701s or Beyerdynamic DT 880s?