I have a 1938 home with galvanized cold water lines running through the basement. After seeing the plumber do two bathrooms in PEX, I think I'd like to have the galvanized replaced in PEX. I would like advice on how to run the new PEX. Should I follow a similar path as the original run, or mimic what the prior owner had done with the hot lines and make the runs around the perimeter? I'm open to other ideas, but cannot do any home runs because all of the spaces have been remodeled. I'd like the changes to be confined to the basement. A picture is attached of existing runs and two proposals. Thanks in advance for your help.