RHA MA-750i's are phenomenal, especially with the memory foam on the buds. I can wear these on a plane and even without music on can hardly hear the roar of the engines. When I've taken them out to order a drink, etc and had music playing I've had flight attendants remark on several occasions how they couldn't hear the music at all until I've removed them from my ears.
Best of all they come with a 3 year warranty. I had an issue at one point and they replaced the set free of charge within the 3 years. They also sent me replacement memory foam tips several times without question.
Highly suggest! BTW - I purchased mine on Amazon.