Nice clam!
I have a 5 stage BRS unit and rally really LOVE it! Great quality and easy to use. I added the piggyback membrane to mine so my 75gpd unit produces 150gpd now, which is what I need since I have so many tanks. lol You'll be pleased with your unit.
You can get ro/di units for drinking water. My parents run one and a UV light on their line at home. What ends up becoming necessary is that to make it through all the filters takes some time, so to turn on the a tap to get a drink (usually having a seperate tap for the ro/di water from the regular tap at this point) takes a long time to build up and fill up your glass. To get around this, you'll find pressurized canisters that are sold alongside these units to meet this need.
To the OP, I loved my 5 stage ro/di from BRS. Only stopped using it because my water is SO bad I couldn't keep up with replacing the filters/resin...that's what happens when fertilizer runs off a corn field and into your spring. Once I move, it is back up and running.