I take it one step further and roast my own coffee. It's the only hobby I have that has actually saved me money. Super top shelf green coffee can be had for a fraction of what the boutique roasters charge for a pound.
I've used RO water in the past but needed to add some minerals back to it so the coffee wasn't so flat. Stripped water really isn't ideal for coffee making. Now I just run my water through a carbon block to remove the chlorine taste.
For my morning brew I use a Technivorm drip machine that I have had for 15 years and still looks and works like new. They are built like a tank in Holland and worth the high price tag. In the afternoon I like to hand extract some elixir with the ROK.