I bought my son a 457 Varmint and put it in an XLR Element 3.0. Put on an Area 419 30 MOA Rail and mounted a good scope. Swapped out the trigger spring for less than $10 and it's a shooter. The best part is that it's not too picky about ammo either. It shoots all SV ammo well. Of course some ammo shoots better than others, but it's all still pretty good.
It's a righty. I liked it so much I wanted one for myself but at the time they didn't have any lefties anywhere.
I decided to pick up a RH Tikka T1x to play with. I put it in an XLR Element, added and Area 419 Rail, and swapped it's trigger spring too. It was an identical setup to the 457. It just wasn't as nice a shooter. Bolt was not as smooth and I didn't like the slimmer contour barrel. It was good with ammo too. Not too picky. Shot regular SV well. Almost held it's own against the CZ, but wasn't as good all around.
So I sold the Tikka and was on a waiting list for a LH steel barreled B14R. I just wanted the barreled action since I knew I would drop it in chassis and upgrade the trigger anyway. I was on that waiting list for a year.
I got tired of waiting so I ordered a LH Vudoo 360. Wow. Talk about a nice rifle. Everything about it is nice. I especially like the AICS sized mags. Much easier for my to manipulate vs the CZ Mags.
All that said, the last time we hit the range with my KYL target and other challenge targets, my son beat me. First time he's ever out shot me.
The big reason was that I was trying out some new ammo in my Vudoo. It's much pickier about ammo, and it didn't like the SK Long Range that I tried that day.
But between the 3 you listed. I've had 2 of them and I'd say CZ over the Tikka.
And I'd go with the Varmint barrel too.