I have 3 of Bruce's Precision Intermediate Triggers in various Sigs that came with short riggers. The bottom line is that they are excellent. One did require a trip back to Gray Guns for minor fitting to clear the trigger guard, but the other two dropped right in without problem.
The benefits to these triggers are twofold. First, their geometry eliminates the bite that some shooters experience with factory short triggers. Second, they eliminate excess over travel - the break is literally at the very end of the trigger pull.
I find the SRT to compliment Bruce's triggers to create one of the best DA/SA pulls and resets in the industry.