I plan on getting both the HE4XX and the HD58X or HD6XX. Which do you think is the better combo to have? The HE4XX and HD58X OR the HE4XX and HD6XX. I mainly listen to indie/alternative rock and classic rock with some EDM and some classical. Would run both balanced off a Fiio Q5S with AM3B amp module. Any advice would be greatly appreciated! I’ve been agonizing over this!