Headphones? Anyone?

First, please don't tell me about head fi. My problem is not a lack of info, it's too much. Just want quick recommendations from anyone here. Every time I think I found "it", there's one more opinion to throw a wrench into the works!
Just received my Little Dot mkIII, only to find that my good old Grado 60s have a problem. No bass from one channel. Not the amp, it works fine with other cheap phones I have. Sounds great as a preamp too.
$100 to $250 please, didnt know I would need to replace so soon....thanks.