I have the cz550 in .375 with a Vari x III and talley rings. I love it!

I use two scopes on my Model 70 in .375 with Warne quick detach bases and rings. While I like the Talleys on my .416 Rigby, I find the Warne set-up a little less obtrusive because of the location of the quick detach levers (on the left) and the fact that they hug the scope closer. You will need an extended front ring base. I use both the 1.5 X 5 Leupold and the fixed power 6 X 42mm Leupold. The first for bigger stuff and the second for all-around plains game as well as dim light shooting such as in a blind or dawn/dusk conditions. By the way, I think the fixed 6 power scope is an excellent price/quality scope and very rugged.