I had an Escaping Outdoors FL35 (12.5 lpm and 35 psi). After 13 years of use it failed. I was quite happy with it but replaced it with FL40 (17 lpm and 40 psi) then used the old 35 psi pressure switch to reduce the chance of leaks. If I wanted to connect a hose to squirt water outside (e.g. wash the van) I would probably choose more.
Otherwise I am quite happy with my choice. I don't notice that extra flow rate. Too much would probably tend to splatter in the sink.