The vastly different assessments here shows how subjective rating commentators is. My all-time favourite trio was Casey, Carfino and Gaze. Without Gaze, I would happily inject Heal into the lineup. Heal provides a good balance of enthusiasm, analysis and insight, knowledge of the game, and the status of an Australian basketball legend.
It takes time for commentators, especially past player commentators, to adapt to the role behind the mic. I was very impressed by Anstey's insights, although complaints that his tone of voice comes off as quite monotonous for TV commentary seem valid. Kerle suffered likewise with his monotonous voice, although has improved somewhat since, but he doesn't impart the same basketball wisdom as Anstey routinely does.
As for other commentators, I really like Tragardh's commentary. Santamaria is underrated as a commentator. I treat Corey Williams as a joker commentator as I tend to assess many of his basketball opinions as not so credible. Viewed in that way, he is entertaining to listen to.
The main weakness in the NBL is the play-by-play commentators. In my mind there is Casey then daylight. Dwayne Russel is painful.
For all the complaints here, I think the mix of commentary in the NBL stacks up fairly well compared to the local commentary in the NBA. There are many very painful commentators in the NBA. I don't notice the same level of biased homers covering the NBL. Then look at livebasketball.tv and the commentary in the NBL seems brilliant by comparison.