Ruger M77 Magnum for me. I have owned both. The CZ is a good rifle but in my book the Ruger is the most rugged dependable rifle available. I have heard of problems with some of the .416 rigby caliber rifles, but I think that has been cleared up. Mine is a .458 lott and has taken buffalo and hippo. It has performed flawlessly. It sports Warne QD rings and Leupold VXIII 1.5-5X20. I may change to a 30mm scope though. Im looking at Trijicon and the VX7 low power models. Obviously either rifle will get the job done! Good hunting.