I need help picking out a RO/DI unit and a Reactor. My wife is buying me one for Xmas and I get to pick it out. I need one that has a faucet adapter so I can use it until I get a chance to install into my plumbing. I dont know a thing about RO/DI units or Reactors period. Also dont exactly know what the PSI has to do with a RO/DI units. Ive always bought my water from LFS. Any info about these units would be helpful.