I can't speak on Cz's Lux variety 550's. But if I'm comparing their regular fit and finish of the 550 series when comparing it to the non super grade FN herstal made model 70's, the model 70's win out every time. The Winchesters have a smoother action, better machining, better checkering, have a three position safety, are glass bedded and IMO has a much better stock design and finish. The CZ 550's quality was going downward in the last years of it's production due to old tooling. The FN herstal Vienna made model 70's do not seem to have this same issue. Don't get me wrong here, the CZ 550 is a fantastic rifle. I just don't think it stacks up to the quality over all of a FN made Model 70 safari express.
Thanks for that reply. I've never owned a 550 but have had a couple of 602s and would agree that the fit & finish was not as the same level as a Winchester. Both 602s were quite accurate and worked well without issues. My biggest beef with them was the excess weight. The 602s are too heavy for a 375magnum.
In the end, I had no real use for a 375 or other med bore so went back to a 30cal for my "big gun".