For someone like myself who used a Wagon R for 6 years, the decision to buy a new car was tough. After a lot of research and intercation with people from the industry, the following emerged:
Technology wise the K Series engine is state-of-the art.
Opt for a vehicle from Maruti Suzuki.
Choose between Swift, Zen Estillo, A-star and RitZ
The above narrowed down the choice to: A-Star and RitZ. A new type of engine and a recently launched car brought forth numerous apprehensions.
As a proud owner of a RitZ, I recommend the car without any hesitation. The purchase would not cause any regrets at all. Driving turns into a pleasure even in peak hours. Given the Delhi climate, the AC is super effective. Ignore the outside look / shape in favour of all the other plusses. The rear passengers get comfortable leg room. The dicky has more than enough storage space.