Gigabyte M28U died, how to replace it?

So unfortunately recently my gigabyte M28U monitor had some sort of issue with the hardware and so I sent it back to the seller under warranty who basically ended up saying "sorry bud can't do anything just have a store credit." Which ended up being about $600 AUD.

Now I could get a full refund but ultimately I'd rather just get another 4k monitor at a similar price range/specs. It does seem that the m28u line is not widely available anymore, so does anyone have any suggestions as to good replacements at a similar price range, I don't mind paying a little extra for enough of an improvement. I do see there is an m27u that might be slightly better(?), but maybe gigabyte just has crap quality control.

Also, the original vendor was Scorptec AU, just in case it helps.