Broadview Hts/Brecksville school district is very good. I would say just as good as river or Bay. Others in Cleveland area that have what I would consider good schools...
Strongsville, Westlake, Hudson, Solon, Chagrin Falls, Beachwood, Pepper Pike, and then some that are way out east (like Chardon).
I would put Medina, Avon, Macedonia/sagamore hills in the better than Ok, but not great.
I would put Twinsburg right under this last group (better than OK, but not quite as nice as Medina, avon, macedonia).