So I'm now looking to upgrade from my Audio Techinca M50s which I've had over two years.   I'm looking for a set of open cans, along with an amp if needed. DAC not needed.   I listen to a lot rock music, ambient electronic, and a bit of hip hop.   I'd prefer something that is not bass...

I plan on buying a pair of open cans to go along with my m50s. I'm sur emost of you know these are a bit bass heavy.   I will be running it through a fiio e11 amp.   My Budget is $300-$350   Thanks!