For a DA auto .45 with external safety the HK 45 or USP series reigns supreme in accuracy and dependablity. the HK .45's are a tested and proven design and built to survive tens of thousands of rounds.

The Smith M&P could be close if they made some improvements in the design but in my hands it is not any more ergonomic than the HK 45.

The Springfield XD or XDM is not even close IMO.