The quietest pump you can get will be a two speed, running on low.
Not sure why you had problems with the Hayward Super -- it's an old model and generally VERY reliable. Not the greatest efficiency, but excellent suction and self-priming capability. I've got a Super running on a 6,000 gallon kiddie pool -- it's been run dry half a dozen times (pool leaks, guards are slackers) but still works fine after 4 years. It's fairly quiet on high, but runs on low all winter and during the summer after July 4.
Anyhow, I'm personally not a fan of the new "super-efficient" pumps. It's been VERY hard to get the actual flow / pressure / amps data that would allow apple-to-apple efficiency comparisons. Usually, when such data makes the sales case in a big way, the marketing department will basically air drop it all over you. But, when you can't get it . . . usually that means that it does NOT make the sales case.
And the simple fact is: complicated and new = less reliable. So, I wouldn't want one of those pumps on a pool I had to service.
But, suit yourself.
Ben
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