Azurys

Honestly, I don't care too much for closed backs myself. If you had to look, some alternatives I can say are well regarded are the Audio Technica ATH-M50x, DT 700 Pro X, MDR-M1, if you have a burning hole on your wallet and want to again spend a lot then Focal Azurys I can recommend as ive actually tried it, but its msrp is around 500. Really the best thing you can do is just go and try on a bunch.

Probably my Monarch Mk4 IEMs, just seriously good listening. Switch for more bass, dont change massively with different tips, but enough you can sorta alter the sound without EQ. Close would be my Focal Azurys. They were mega cheap on sale recently and I wanted a pair of closed backs because I mostly, only used open backs until I tried out Hyper x cloud IIIs and liked them, also had some in ear issues so couldnt use IEMs for a short while. Absolutely love them.

Could be a lot of things that you don't like about them. Personally I find that dynamic drivers sound warmer, more natural and smoother which is more pleasant some of the time. It could be that, that's a big factor for you. The Aria Stealth are planars. And then, the aria is open back so it's going to have less bass because the sound is allowed to escape, deliberately. The aria are undoubtedly giving you more detail, both spatial and technical the XM4s but they're a different type of headphone delivering a different type of experience. If you want an upgrade from the XM4s in a closed back, wired planar, you might want to try something like the Focal Azurys.

It’s not great on the Azurys.

These things can be pretty subjective. I use my Azurys when I'm commuting. My train travels underground for roughly half it's journey and I have no complaints about the Azurys in those conditions. Sure there's a little more noise which I'm vaguely aware of but I don't need to turn up the volume or anything. And for in the office they're fine. I can't hear my annoying colleagues at all.