Current Audio Equipment:

KEF X300 for computer speakers
Fiio Q5 Dac/Amp - can’t wait for that new THX amp
Sennheiser HD 58x - balanced cables
HifiMan HE-400i
Sure SE535
Tin T2 - KZ Bluetooth cable w/adpx

Car Stereo:
1995 K2500 Suburban - middle and rear seats removed
Old mediocre JBL 10" sub setup behind my seat
Midrange Memphis two way 6.5" in rear doors
4xSony 3.5" in rear ceiling
Alpine R Series in front doors
Stock head unit with bluetooth and 3.5mm inputs

To-Buy List:
6 Channel Amp for truck
Satellite radio receiver with tiny screen
Signal Processor

Looking for some headphones that sound as good as my HE-400i but with more bass. Budget: $500