Should I get a Reverse Osmosis unit?

[Afid]

I have heard a lot of really great things about reverse osmosis and I was wondering what people thought of it. Is it worth it? How much of a difference does it make? For some extra context, I currently use well water (I haven't tested it, but I expect the tds is pretty low) and it has no added softeners or anything. I have a collection of around 50-60 orchids, but I want more (of course) and I have fallen in love with some of the more picky species (Disa for example). Anyhow, I'm just looking for some general ideas so I can prioritize saving up to get one (or beg my parents to get me one for my birthday) if it seems necessary.