I was recently debating between a cz457 and Tikka T1x. I ended up getting the T1x because I couldn't find a 457 with synthetic stock anywhere. I have been completely happy with it so far. Accuracy is better than my expectations.
I have a Tikka t1x that I put together in a modified mdt hs3 chassis with a magpul fixed a2 stock that I use for nrl22. I also have a ruger precision rimfire that is okay but the back half of that gun feels like a toy. The 10/22 mag compatibility is nice though.
I have a CZ with Leopold 4X , rimfire scope on it.ive shot hundreds ( not kidding) squirrels with that little rifle. Beautiful walnut stock, nice bluing. , 1 hole at 50 yards... squirrel pot pie..MMMMMM