I realize I'm coming late to the party, but I'm glad you went with the CZ. I still have a sour taste in my mouth about the new production "Winchester" M70's. I can appreciate that the new manufacturers are probably better at it than the last run of Winchester made guns, but a Winchester ain't a Winchester if it ain't made by Winchester, in my book.
I'm a Ruger guy, but sadly, there isn't Magnum option available for them these days. In cutting this same mustard for myself lately, with a CZ, an M70, and a Ruger on the table, I picked up TWO of the Rugers first, but was compelled enough to not be willing to leave the CZ behind, and I didn't even look back at the M70. As such, I'm building on two Ruger M77 Hawkeye actions for a 458WM and a 338WM/416 Ruger, then planning a Lott in the CZ550 action.