Top canti's is a tough question.
For Shimano I really like MT-60's. Look and function great, toe in can be a bit tricky though.
Aftermarket is a different story, Grafton's, Joe's, Critical, Campy, Hershey, Machine Tech, Paul's, etc. Pick your flavor, they all work great if set up properly. I prefer the aftermarket spring tension adjustment designs over the Shimano system, which is more about equalizing the arms than fine tuning the springs. Also it is much easier to adjust toe in with most aftermarket cantis.