Recommendations for headphones under $400?

Not sure how big of a basshead you are, but, for the money, I'm pretty happy with AQ Nighthawk.  Enough bass for most of my listening.  Some folks don't like them, but I find them very comfortable and non-fatiguing.  Easy to listen to for long periods.  They won't rattle your brain very much.  Pretty sure they can still be bought new for 299 with generous return policies.  25 ohm, so can be a problem with some amps.

A lot of folks are raving about the Focal Elears and being 90% of the Utopias.  Pop up occasionally for around 550-600.  If it's 90% of the Utopias at that price, probably can't go wrong.  Bass on the Utopias is quick and solid, but not yuuge,  Love them.

I'm a headphone noob, within the past year, other than always having something cheap around just because.

    uberwaltz,

      If you want good, accurate bass that's able to go as deep as the music demands without sacrificing mid-range and treble performance, I'd suggest either the Oppo PM-3 or Sony MDR-Z7. 
      The Oppo use planar magnetic drivers while the Sony use exceptionally large conventional drivers.  Both are closed back, very comfortable and very good but slightly more than your $400 budget.

Tim

@noble100
Has been a couple of recommendations for the Oppo but only ones I see remotely near my budget come from Hong Kong and not sure they can be trusted to be genuine?
Have to keep searching....

At the much reduced price of around $250.00 NOTHING can compete with the HiFiman HE-400i’s!!!While they don’t go as low in the bass as some choices the wonderful rich midrange and extended sweet treble make for hours long listening sessions with no fatigue...Decent imaging and staging and fairly easy to drive...Should sound fantastic with the Schiit amp!

@freediver 
They are definitely well within budget!
Quick eBay search shows $210 new and $150 preowned.
Research time......