I have a CZ550 in 375, and one thing to bear in mind is the length of the action. If you intend on mounting onto the dove tails then you need a scope that is long enough. Some people will mount additional bases onto the dovetails to offset the distance, but I find it puts the scope far to high up. There is a very informative thread on Africa Hunting
Here.
I have two scopes both in Alaska Arms QD rings, a 1-6x and a 3-9x.