If your pressure at your house is under 50psi then a pump is a good idea.
My pressure is around 40 so I have added a pump[years ago] . The difference is large in the amount of waste water and the time it takes to produce volume.
I run a BRS 6 stage chloramine deluxe system with an extra canister on the front end.
Things like a flush valve ,TDS
meter ,pressure guage and auto shut off are nice to have . Many systems do not include them some do. All can be purchased separately as add ons.