Having shot Sigs a lot over the last 2.5 yrs, and having shot a Wilson/Beretta 92, and owning a CZ SP-01 Tactical, and holding an HK P30, I’d rate them as such:
1) Sig
2) CZ
3) HK
4) Beretta
...the slide mounted design just seems to be in the way of manipulating the slide. By far, the Sig design is king here, IMHO. (Granted...hand size will greatly influence your choice)