I am currently in the process of building a house and getting ready to start the plumbing. I am using pex with copper fittings at the shut off valves. My plumber who is assisting me wants to plumb the house like a conventional copper system. I have come accrss many houses that have a manifold system with homeruns for all the pex. I want to make sure I get the best possible system with the best pressure everywhere(especially since I have a well which yields about 10-12 gpm) and I am wondering which way is better to plumb the system