Are these Speakers the BEST on Planet Earth ?...

Because eight 7" drivers will not begin to produce the kind of LF that superior SOTA speakers can produce.

Why would you state so? Eight 7" drivers can actually displace a lot of air while still responding much faster (less mass, less inertia) than a single or dual 12" or larger cone woofers. Another benefit is the higher breakup frequency over large woofers.

I've actually heard Kii speakers in person and while having great bass, no coloration whatsoever, they lacked effortlessness, there was some kind of tension, for lack of better words and they were not the most transparent speakers I have heard.

No big woofer no speaker. Just a soundbox.

sharbatgula, you point out one of the outcomes of multiple smaller bass drivers; the speaker cannot - and I do mean "cannot" - sound as effortless as one with, say, multiple 15" drivers. The "tension" is due to the use of smallish bass drivers versus drivers that will with ease produce the LF. 

As regards your saying they are not the most transparent, there are many factors involved in the system's transparency, so I would have to listen to the speakers in perhaps up to 6-10 systems to know their limits in that regard. No one is able to know a speaker's absolute traits from one or two systems.

There are so many great speakers out there, is there one that is sooo much better than another?  It really comes down to the ear of the person listening, the amp driving them. The source feeding it and so on