You dont need to. Monarch 2 is the best for me, not even considering the price.

I’d demoed/bought many IEMs, some even 2-3 times the price of monarch, and I sold everything, and bought Monarch mk2 new.

I am happy and sad now, happy coz I found my love ones, but sad coz I have no appetite to upgrade anymore. :)

Nice! I just received the III today. No time to test it out yet.

First off congratulations! I recently got my Monarch MK2 too. Do yourself a favor and just allow yourself to be happy about what you have before looking over your shoulder about something next because the higher you go up the price ladder the harder the law of diminishing returns will be to overcome and what you have in the Monarch MK2 is so well done and well balanced in sound that nothing really truly is objectively proven better all together over it. You will only get deviations from certain points here and there but I don’t believe there is tech out there that truly is double the sound ability of the Monarch mk2 at any price. But the same can be said about other top S tier IEMs. The Monarch MK2 won’t be double the sound of those other top S ranked IEMs either. So just be happy that you have a wonderful IEM that you can easily claim as your endgame.

really expensive audio is like really expensive clothing. the reason the price is higher is usually something besides the core functionality of the product in question.

and keeping along that path, fit and synergy are more important than the mindset that thing over there costs more so it has to be better… that’s not true with jeans, and it’s not true with IEMs or amps etc.
IMHO you should go into all audio purchases with the idea that what you’re getting is going to sound different, not “better” - especially not if you’re already firmly in the mid-fi game and spending hundreds on gear.