So guys here's some update on my forever search to find a direct D5200 upgrade.
I tried TH900 Lawton (Type 2 Quilted Maple Wood) and to my surprise...... It sounds really..... Not that bassy? I think Lawton pad focus more on resolution/clarity while having less bass, but I also tried it with Dekoni TH900 lambskin pad and TH610 pad, which make it "thicker" sounding / richer timbre at the cost of clarity/stagesize.... etc. So it's different trade off.
Crazy enough I still think I like D5200 better LOL. Might potentially sell off TH900 Lawton later.
On a side note, anyone here tried Sundara Closed? Also is it worth it for me to try D7200 just because why not?
Dac / Amp wise anyone has experience with Denon's own DA-310USB?
https://www.amazon.co.jp/-/en/Headphone-Amplifier-Resolution-Compatible-310USBSP/dp/B01N8Q8URC
Or anyone tried Hifiman's EF400?
https://store.hifiman.com/index.php/ef400-736.html
Thanks!