Hey, you've made a good choice I should say. R S Puram is a mix of residential and commercial spaces making it a prominent locality of Coimbatore city. It is well connected to the rest of the city and has hospitals, schools & colleges, ATMs, supermarkets, restaurants etc in the vicinity, making it a good locality to live in. Already established residential projects like Adroit Ivory, Mayflower Royale, Ramanis Vasavi, Srivari Anmol, Jain Ratna Apartments are well functioning and I believe there are a few apartments not yet sold. If you're looking at a buying a flat in a brand new apartment complex, you can go for one of these projects: Srivari Amrit, Saravana Velmurugan, Ramanis Lake Garden, Marutham Amber, Sakthi Rama Tower etc. 2 BHKs/3 BHKs (between 1100 & 2500 sq ft) are available at a price range of Rs. 65 lakhs to Rs. 2 crore and plus.
R S Puram (Rathina Sabathi Puram) is considered a prime residential area in the city. Located between Mettupalayam Road and Thadagam Road, it is also a shopping district. A number of well know schools and hospitals are situated here. ATMs, restaurants, supermarkets auto/bus stands are in plenty. There are old residential projects you can look at like Marutham Opulence, Cosy Towers, Mayflower Royale etc. If you're a stickler for new projects, you should definitely take a look at Sakthi Summit, Sakthi Rama Tower, Ramanis Lake Garden, Marutham Amber etc. which are available for immediate occupancy. All of them have 2 BHK and 3 BHK apartments, priced between Rs. 65 lakhs and Rs. 2 crore for a floor space of 1040 - 2400 sq ft.