I'm using an Ifi Hipdac right now but have a JDS Labs Element III arriving tomorrow.
I've been into this for a little less than a year now after using gaming headsets for many years and pro audio headphones (DT-770, K240M) before that.
I received the rubber cable with my Elegia as well. It pokes my neck unless I rotate the connectors correctly so the kinks angle out. The cable looks great (love the connectors) and doesn't transmit sound but is a pain otherwise. The Elex has the older vacuum-cord style wrapped double cable. I have not tried it yet because it comes with 1/4" and XLR only, and the Hipdac is 1/8" and pentacon balanced only, but I'll give the 1/4" cable a try with the Element III later this week.
For music listening, I use Amazon for its FLAC streaming and also play a lot of games on the PC with Dolby Atmos for Headphones.
I also purchased a set of Dan Clark Audio Aeon Closed X recently and like them a lot. The Aeon has a very different sound than the Elegia. The Aeon is much softer with more extension on the bottom. It's like the low end is set back a couple feet but goes way deep when needed. I also find it easy to listen to for long sessions because it's softer and has less attack. The planar sound might not be for everyone, but I enjoy it, and it's an enjoyable changeup from Focal's sound siganture.