There's nothing really wrong with the X-bolt, they're just not as smooth as a Tikka. That's mainly due to having a tri-lug bolt and a shorter bolt throw. IMO, the X-bolt handles recoil significantly better than a Tikka does in factory configuration.If it were me between those two the T3X, I haven't heard a lot of good about the X-Bolt but lots of raves for Tikka.
I am personally leaning toward a Howa instead. Since I'm pretty convinced I will end up modifying the rifle, the $150-200 cheaper Howa price tag can go into the Better Stock and Bipod fund.
If sky were the limit I'd be on the waiting list for an ARC Coup De Grace.