Thanks for reading and for the comment!
As you probably already know, most gaming headphones/headsets are closed back…which is kind of weird now that I think about it. The lone model I can think of that ships in a semi-open configuration is the Astro A40, but it’s out of your price range.
I’ve never used the K240 Mark II, but I reviewed and rather enjoyed the original K240 last summer. It regularly goes on sale for under $60, and it’s a great deal.
The thing is, if you’re not a fan of harsh/aggressive highs…that’s usually the thing that open-backed headphones excel at. It’s easier to make a warmer/bassier/ “softer” headphone with a closed-back design, because of the nature of physics. The SRH440 has a sound that’s trying to mimic the classic Sony MDR-V6, which also had aggressive highs…so I’m not saying that closed-back headphones aren’t fatiguing, they’re just usually warmer than open backed ones thanks to extra bass response.
The Cloud Alpha has a very nice, flat tone with nothing that sticks out.
If you can swing it/find a good deal on one of them, just going by what you’ve told me…I think you’d actually really like the Sennheiser HD 558/559/579/598/599. There’s not a ton separating those models sound-quality wise, and although they usually sit just above the $100 mark, you might be able to find one that sits near your price range. As of this writing, Amazon has the 579 for $115.
The Sennheiser 500 series headphones have a very pleasant sound signature, and if that’s still too aggressive…there’s not much more I could personally recommend.
Hope that helped you out in some way! Thanks again for reading! Don’t forget to buy from a place with a good return policy! :)