I, and many other people I know have a typhoon brand of RO units.
I have the typhoon RODI unit, it is 75 gpd, and it has 5 stages. It was 150 plus the TDS meter I bought.
Another good one is the typhoon 3 RODI, the only differnce between the typhoon and typhoon 3 is the tyhpoon 3 has more...