I stand by the quality of them all, but if you intend to buy Manhattan 8K RES specifically to “critically analyze complex problems”, which is a narrow and complex skill rather than a metabolic function. I’d advise you to think it through.
For peace of mind it’s best to check what type of brain fields it is (which I explained over here) or go with it with an open mind after reading reviews.
There is also the Wholistic thinking, which refers to a full picture thinking. Just mentioning it in case you didn’t have a look at it already. Otherwise there will soon be another wiring field dealing with what you are looking for.