Good replacement for GSP500 - H6PRO, ATH-GDL3, or another choice?

Hello everyone, I have been using a GSP500 since early 2018 and now its earpads are quite tired and rough on their surface in long-time use. So far, I have found three options: 1) replace the earpads, 2) H6PRO (Open), and 3) ATH-GDL3.

Replacing the earpads is for sure the most straightforward and cheap way but if I go for a new headset option, I would like to hear your opinion about:

1. Is there a significant difference between GSP500 and H6PRO in their audio quality? It seems their units are different according to the official fact sheets but I have seen a comment that H6PRO is just a renewal of the exterior of GSP500.
2. If anyone who's tried both H6PRO and ATH-GDL3, how would you describe the difference in the characteristics of the audio quality between them?
3. Are there any additional recommendations of yours to be considered? My specifications are below (bold is a must):
   1. Open.
   2. Less than $250. It's about the original price when I got the current one. Is it now less than $100? Aw :/
   3. Okay to use for general music or other audio purposes. I don't need a superior quality in listening to orchestral music, but it'd be annoying if everything I listen to becomes a cheap radio. I mean, at least comparable to my current one. Doesn't GSP500 qualify the okay level? Aw :/
   4. Good for people with a big head. I currently use the GSP500 at its widest span of the headband.
   5. Larger earpads so my entire ear will be covered, instead of "attaching the pads on my ears". As far as I've seen online images, ATH-GDL3 might be a bit too small for this standard though.
   6. Microphone, preferably some built-in function to mute.
   7. Wireless connection is fine if it has no appreciable latency for gaming (i.e., no Bluetooth).

One note is that I don't limit the choices to gaming headsets. e.g., If there's a good option despite lacking of specification (f), I'd consider it too. I appreciate your comments and suggestions.