Yes not enough info. Low pressure or high. A lot of the high flow pumps require 1.5 inch plumbing to be effective.
If you have a lot of plumbing and small pipes then make sure you get one that is effective with back pressure like iwaki. Internal or external matters for noise reduction. Water is a good add blocking some of the noise from the pump.
I am using two diablo 10500 dc pumps on my returns. Very efficient but reliability is not good. I have three of these pumps two have failed but warranty covered brand new ones. 1 power supply also failed but I had extra from the two new pumps they sent me. So support is good at coralvue.
Before that I used the largest iwaki and it lasted 15+ years before it failed.
The diablos are retired - maybe because of failures? New versions were supposed to be out but I haven't seen them.