I am very happy with the Shop Fox Classic on my 1023s. It is a re-engineered version of the Biesemeyer that uses heavy nylon sides. Fence and rails are heavy-duty and extended rails are available. In five years I have only had to tweak the parallel adjustment once. Several of the magazines have given it a good gradecard with the main drawback being price. It is nearly as expensive as the Bies after shipping.
Our son just purchased one of the Grizzly contractor's saws with the aluminum version of the Classic. I gave it a pretty good workout while we were finishing out his house this fall. Similar to the Classic and works well. I still prefer the Classic. But I'm an old fart - hard to retrain.
Grizzly has another that clamps on both ends and uses a micro-adjustment system. They are kind of complicated and use internal moving parts to maintain parallel. I used one in the Grizzly, Springfield store a few years ago and it was smooth as glass. However it has had some iffy reviews and the Grizzly sales-rep was even steering me away and toward the Classic.
RonB
RonB