For anyone that uses an R/O system in your house what brand are you using and how many stages?

I'm thinking about getting an R/O system mainly for myself for my drinking water since I like to mainly drink water and in the long run would be cheaper than the good old brita, plus having an R/O system would provide me with water for my mistking system so that I don't have to buy distilled at the store.

Looking for some thoughts / opinions on R/O systems that are out there

Big difference i've seen is that there are RO units and RO/DI units. And that some systems use 5 micron sediment filter and others go lower down to 1 micron. Seems that an RO/DI unit will get you 0 TDS water. Is 0 TDS water necessary for that no spots on the glass / no mister head clog water? or would a non DI / 5 micron sediment filter unit work fine?