Phaser,
Well of course there are many tables, arms and cartridges out there.
If we follow your argument, there can be NO declaration of SOTA in High End Audio because no-one will ever hear every combination of deck, arm and cartridge.
We must rely on others to provide experience and knowledge (just as we do with car reviews) and narrow down the ' contenders' .
Mikey Fremer has heard many more tables, arms and cartridges than I ever will. So has Jon Valin.
There is enough anecdotal evidence on Forums such as this one to make an assessment that the top arms include the Phantom, the Triplanar, the Davinci Grfandezza 12" Ref, and the Cobra.
There is general agreement among posters here and Fremer and Valin that the top turntables include the Walker, the Rockport, the Raven AC and the Continuum Caliburn.
There is some anecdotal evidence from these Forums that the Davinci is better than (or at least equal to).....the Phantom and Triplanar.
I've heard the Caliburn with the Cobra and the Raven AC-3 with both the Davinci and Copperhead.
If I can't make an educated assessment based on the above, we should all stop reading and writing about the High End.