I have a Delta. Works great. It came with my Delta saw . I have also used the Biesemyer on other jobs and like them also. Adjust them and they are a pleasure to use. I absolutely hate using a stock fence on Craftsman saws and others. I never can trust their cuts to be true. I've never used the Incra so I can't comment.
I have neither, but I've used both, and the Incra LS system is really impressive. But goodness, it's expensive. Personally, I just use a crosscut sled.