... the Sony MDR-V6, that´s my best bet. Driverwise it´s basically a 7509, just lacking the fancy gold stuff on the jacket and using a different - somewhat stiffer - head circle system. It beats the pants off of any more expensive offerings, especially for studio purposes and mixing, regarding neutral tonality and the like - by the way, do always check sound mixes with neutral external monitors.
If you are unsure, as you are collecting a dozen good recommendations here on the forum, get to some dealer where you can try them out: Wear them and use them like you are used to it; and use some real material off your workload to compare your needs; try to set a reference first via external monitors, so you know exactly what you need to "hear" after with them.