14'' l heard is better for comfort but 17'' looks better

I'd go for comfort over look.

easy 2 points

If l was you l would go for a good mix between performance and handling for you car which would mean that your car will look good but at the same time the wheel size will not affect the handling and this size for most hatchbacks is 16'' so it depends on what you want from the car but l would say that 14''s are way to small and l think these will look pathetic and they wont be very comfortable either. So if l was you l would get either 16'' or 17''

Whatever wheels you decide on, inform your insurance company of the change or you may not be covered in the event of an accident claim.