What are the best closed headphones that money can buy if you don't want to amp them? Looking for good bass and clarity, with a very natural sound.

So I've spent the last few weeks trying the most high end $200-$300+ options available at different retail stores and I haven't liked any of them. The latest I tried were the B&W C5's, Monster Turbines, Powerbeats by Dre. I even went to a set of headphones just to see if it would help with Sol...