Uprage and Headphone Question: Sony MDR Z7-M2

[edmvsclassical]

As stated I have a Sony MDR-Z7 M2 for like 3 or 4 years now along with a Shiit magni/modi + stack and was wondering if I should upgrade? I got the Sony because, as a hi-fi noob, I figured the deeper bass would be great and tbh I do love them but i'd like to have open Sennheisers. My real question is on the Shiit stack (Magni/modi+) is it worth to upgrade? I see the newer versions so I am interested. Maybe even going up a level or two like asgard and midgard. All I do is use it for music (is Amazon music the best? Its what I use and I like it) and youtube, and I stream a tiny bit on twitch. I watched jayz2cents video on audio and streaming so I downloaded the voxengo eq and I'd appreciate more advice on audio settings or best things to do. I have a blue yeti mic and was thinking about a sure m7+. Thanks for any advice!