As for Tikkas, Charlie nailed it. Tikkas have very good triggers, and good barrels. Everything else is not so good IMO. Long actions that utilize a bolt stop for short action cartridges, a joke of a recoil lug, small ejection ports, plastic magazines, plastic bolt shrouds that are known to break, expensive (overpriced) replacement parts, slow customer service, and little aftermarket parts availability(although getting better), and resale value is so-so at best. Every last part of the Tikka rifle, other than the barrel and the trigger, was designed with one thing, and one thing only in mind: to cut mfg. costs.
A-Bolts, well, let's just say there is a reason why the X-bolt exists as Browning's new flagship rifle. It is now offered in more variations than the A-bolt is, and I would not be surprised if they phase the A-bort out altogether. Trigger design is amongst the worst ever, IMO. Bolt design not much better. Detachable-box-magazine-hinged-floorplate- thingy sucks too. Again, all these design isues have been addressed(i.e. changed) on the X-bolt. As for metallurgy, well, lets just say when you take a barrel off and the threads strip, tapped receiver holes strip, or that when you drop your rifle and the metal trigger guard shatters, the metallurgy probably can't be that good. There are very little aftermarket parts available, factory replacement parts are way over priced, and resale value is not good at all, if you can manage to sell it.
As far as the X-bolt goes, I have no experience with them in the field, and probably never will. Metallurgy is probably the same(maybe that's why they doubled the amount of screws it takes to mount a scope base), and there are simply too many other good bolt actions rifles out there for me to waste my time with Browning, a company who has never gotten bolt guns right to this day, IMO.
In conclusion, it is my belief that there are better choices out there than Browning or Tikka. When all things are considered, other makers offer me more for my money.
These are my honest opinions given to help you out with your purchase. Not to raise the ire of others or start a pissing match. I couldn't care less about what others buy/shoot. Whether or not others choose to respect your wishes and not trash your thread by "sniping" is up to them.........