First of all, if you are truly satisfied, don't waste time and money. I suspect that you really are not satisfied. If correct, the question is why is it that you are not satisfied.
I.M.O., if you are not experiencing listening fatigue, then you are wasting your money. If you are experiencing listening fatigue, you need to figure out what's bothering you.
Some are hyper sensitive to phase and time alignment. Some are concerned with hearing obscure details. If details are a big problem you may want to stick to monitors as they have less bass making details more readily audible. Then again some want details but also want bass. Some want "warm" systems, systems lacking in details. For them details are akin to brightness, even though it's really not bright. I know a guy who has serious high frequency hearing loss. To him a system that would send most out of the room holding their ears is awesome.
Music is personal. You like what you like, but you need to figure out what that is or you can spend many thousands and still be unhappy with your system.
If you want to seriously replicate a life like experience you're in big trouble. You need have a big pile of money. You can minimize the money somewhat if you can solder, or have a friend who can.
I am a detail, be there type. Open baffle is the ideal, but full range planer type speakers physically tend to have limited dynamics. Used Spatial Audio Saphire S speakers are supposed to be quite good, that's hearsay multiplied because I have not personally heard them. Perhaps the biggest problem will be finding neutral electronics, cables, etc.
if time and phase are critical to you Thiel, and Vandersteens are a good starting point. Unfortunately Thiel is only available used, and I have not heard the newest Vandersteens, the older ones are quite warm. I'm not sure that you could even hear cable differences with the older Vandersteens. The new ones are at least much better, but the system was less than ideal so I can't say if you can get details and phase/time alignment with them.
Personally while phase alignment is doable, I consider time alignment somewhat of a canard because it will only be correctly aligned at a specific distance, and your room may not allow for that.
IMO, the smart money is saving up to spend the most you are willing to pay for equipment regardless of your preferences. Otherwise you'll end up incrementally buying amp after amp for instance usually loosing money all the while.
Had I knuckled down and purchased a M.L. 27.5 decades ago, I would have ultimately spent a lot once, but far less over time on amplifiers. Today there are far more neutral, my preference, than just one or two. Even older good amps are expensive, and replacing their electrolytic capacitors is a good idea yet further increases the cost of older gear.
So, I doubt that I have resolved your issues, but hopefully I have told you something that you can find value in.