Beyerdynamic would be a good starting point to look at. For bass response and good mids/highs.
Something closed back.
dt770pro perhaps. Not the best looking, function over form and all that. Id sooner have some IEMs with a portable amp but thatll reach way over your budget for anything worthwhile.
CLICKY
So similar level of bass although these will have much better lows than your Dr Dre things.
Dont go over 30 ohm unless you plan to use an amp.
Reviews on the ones you mentioned over on head fi seem quite good however. Difficult to make a decision without trying them first.