Would ream the CZ to Lott and be happy, but they are a bit heavy for a 458WM.
With good handloads with AA2230, the 458WM is plenty.
I wouldn't go Lott unless you like that specific cartridge. It won't be less than the 458WM, but won't make any practical difference. I like both.
If I need more the 500NE 3" DR with solids gets the call.