High pressure pump shgestions

[Clinkis]

I need a high pressure pump to run a homemade RO with 2 4x40 membranes with the possibility of expanding to 3. I’ve used Procon pumps in the past but just wondering if there are some better options.

[Bricklayer]

My RO has a Weber Webtrol V10B15S 1hp stainless steel multi stage pump. Works awesome. Originally when I bought the RO it had three 4x40 membranes on it from the factory. But I only use it with 1. So I have to option to add if need be.
Nice thing about a multi stage is it warms the wash up as it's running and recirculating then shuts off when temp is reached by installing a PID controller
Goulds makes multistage pumps for high pressure and grundfos does also.