I am lucky in that sence of having a wetroom. So far the only major noise issue was from the 21' run of pipe under the house to the wetroom. I had to make a 90 under the downstairs batroom and the noise sounded like the toilet was going 24/7... It also traveled up the walls and you could hear it in my daughters room

I'll be solving that issue this time with
spa flex and a lot of testing!
Yeah, definately let me know on the eheims... But by the time I bought 3, I would nearly be at the cost of a new reefflo. So if I pick up the reefflo and am able to sell the Geo, I would sort of be ahead... Maybe...