I have quite a few rimfires, 3-10/22's-now down to one. A Gevarm E-1. A stevens pump. A Savage Mark II, and a 93R (.17hmr). A Buckmark Camper. A Heritage Revolver (.22/.22mag). I have a BMR on the way. I plan to buy 1 or 2 more 10/22's, a 597, a CZ and I am anxiously awaiting the Colt M4 to go on sale up here in Canada.
That being said. If I HAD to choose one Rimfire .22 to last the rest of my life and I could only have one.... I'd probably choose a CZ with a Varmit barrel on it.
But that is my opinion, I have never shot a CZ, just held it. Its a solid platform and the reputation is very very good.
Hope this helps!