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AMIT AGARWAL
i guess in the sx you get a driver and passenger side air bag which is good for safety concerns. the tires in sx variant is bigger in width and radius. folding mirrors may not make a difference, you can adjust the speedometer brightness, an auto dimming irvm(handy for reducing glare at night), reversing camera which is very much needed, cooled glove box.
if you buy the alloys from hyundai then im sure it is going to cost you above 25k and then the tires to that is if they have it in stock, or else you can buy the alloys of your choice from outside 16 inch rim 6j match the pcd and up size to 205/50/16 tires as you wont get 195/55/16 which comes in the sx variant anywhere outside.
for 60k your getting a big list of goods.
regarding the suspension ask the service advisor if they can adjust its stiffness.
steering can be fixed by a bit with a good tyre upsize