I think that the set trigger on the Tikka is nice, but.... it has a weird mechanical design that when the trigger breaks in the set position, the blade is pulled away faster than the finger can keep up with. Not that it affects accuracy, I just think it's weird in feel when it happens. I had my set trigger on my Finnfire for a while, but since swapped it off for a TRG trigger as I prefer the two stage pull. The TRG trigger is quite the device- and it mounts on most of the modern Sako/ Tikka actions without issue.
At the end of the day, I think that the factory stock Sako trigger with the return spring swapped out for a lower k spring is the best performance return. It will go down to 12-14 oz easily and few people have any real excuse to 'need' lower. No additional accuracy will be gained below that, and those who really do benefit from lower pulls neither pay attention to this thread, nor build rifles on Tikka actions!