From your list I would buy the CZ550. I built a custom 6.5X55AI with that action. CRF, 3 position safety, set trigger...
I will be buying more CZ's. My next build will be a .338-06 Improved aka .338 Scoville, then a 280AI, both with 550's.
I will be buying more CZ's. My next build will be a .338-06 Improved aka .338 Scoville, then a 280AI, both with 550's.


















































