PEX is great stuff. I have it in my radiant floor and most of my domestic water plumbing. Just be aware that some PEX is rated for potable water, and some is not. My radiant floor PEX is not rated for potable water.
The other thing about PEX in domestic water plumbing is that the flexibility of the tubing can cause it to move as you turn water on and off, so it must be firmly fixed in your wall to minimize rattling noises, and possibly tubing wear as it rubs on your wall studs.
Stop financing a government that doesn't support your values. Sell your U.S. Savings Bonds and Treasuries. Money talks.