Query from Ludhiana, Punjab : Need information and views on membrane technology for water purification

I live in Ludhiana. I am planning to buy a new water filter/purifier. We currently have a UV based water purifier that is no longer effective. I have received suggestions to use RO. I have also heard about "Membrane Technology" for water purification. Is this suitable for water purification in a domestic setting? What are the points to be noted in MT?