New swift is a waste of hard earned money, the car is a toy, nothing more and nothing less.
Its almost a decade old, and 2013 onwards, its quality begins to degrade, currently, its quality is proper crap, begins to rattle at slightly uneven patches.
Aqua is a good car but as others stated, try finding one owned by an enthusiasts who knows and cares about his cars, else it will be a headache.
Also, Aqua has very little leg space and very low ground clearance.
I would advice get a new cultus auto, if auto isn't a preference, get a low mileage city, the model shouldn't matter, the older the better(because localization ruins these otherwise great cars).