Sintered brake pads will be quieter with a little more bite than Semi-Metalic pads.
Carbon and/or ceramic embedded pads Will stop you sooner, but are not budget priced, and also wear rotors a little faster(but rotors are throw away/replacement parts anyway).
Aftermarket rotors do Not stop you sooner either, even high quality brands, they are mainly just a small weight savings, are supposedly more resistant to warping from better materials and mfg process, and for looks.
Better cooling is a claim, from different shapes and materials, but there is no good way to test that accurately.
Stainless lines also provide a better lever feel, but won't stop you sooner.
Brake fluid breaks down over time too, and 2 years is the average life.
You also Cannot mix brake fluids, if it calls for DOT 3, 4, 5, etc, that's what you must use(The master cylinder cap will have the required brake fluid written on it).
Change the fluid on time, and the master cylinder seals will last alot longer.