For OE wheels in that size, they are ridiculously heavy, but you can certainly buy lighter ones. Tires can vary a lot also, with "better" tires generally being lighter.Regarding bigger brakes, wheels, and tires.
I was surprised that the chrome plated 5-spoke wheels with tires is so very heavy. Adding bigger brakes will increase unsprung weight even further. Pay attention to the weight of larger aftermarket wheels and tires and brakes. Less unsprung weight should improve ride-quality and performance handling.
"Big brakes" are more cosmetic than performance, as exceptionally good braking can be achieved simply by switching the stock pads to a "better" compound.
Based on several theoretical criteria, the optimum performance shuld be achievable with 17 inch wheels, high quality tires, and high performance brake pads.