So many options, with none being the outright "best". It all comes down to your objectives and preferences, and the trade-offs you are willing to make to achieve that.
For me and my specific objectives, I like the Rearden mounts. Plenty of options for cross platform use (ar-15's to bolt gun applications). The taper works great. High quality. Extremely repeatable return to POI. No issue with cans loosening when using proper procedure (note - I don't really do mag dumps or have any FA's).
But what works for me may not be the best option for your specific applications.