Which headphone sound good using the Creek 5350 SE headphone jack


Most of my headphone listening is working out or travelling.  So I don't have great headphones.  With Covid 19 and my wife and I both working from home; I miss my louder music breaks... so it's time to take the plunge. I tried a pair of Grado's 100s and they sounded bad. Not sure of the specs on them.  I've heard the headphone jack on the creek is high impedance- so mb a bad match.  Any thoughts?  I have my eye on a pair of Sennhauser HD650s, wish i could demo them with my Creek before I buy.
rich_barrett
If your source is digital, the Ayre Codex is outstanding.

If you want to keep your budget low, consider a Project headphone amp as a decent upgrade.
What sound characteristics are most important to you in headphone listening?
My budget is about $500.  I think I would like to err on the warm side with headphones to avoid ear fatigue. 
  Thanks for the links, sounds like one person really liked the HD 650s with their Creek.  I think I will check out the Massdrop.  $200 is hard to beat.
thanks everyone, appreciate your input!

ONE MORE QUESTION: The Mass drop headphones have the option of a extra  TRRS Balanced 2.5mm Headphone Cable for a little more. Is this necessary?