Tyreke Evans, Derrick Rose, John Wall. Those are all above average point guards and Utah would be very good with any of them. Calipari recruits pg's that are successful in the NBA. Knight will be a good pg. The Jazz just have to decide if there is someone better at the #3 spot.
Knight is a lot different than any of those 3 PG's you named though. Wall,Evans,Rose where all atheltic freaks who relied on their size and athletic ability score. Knight is more a quick footed guard, much like Harris (plus shooting). I think he has the potential to be better than Harris because of the shooting. Also Harris was pretty good before injuries and The Nets really stalled out his development