Changing parts for my Eclipse.

My car passed 100,000K+ last month and I was told I need to get the timing belt changed because that can really EFF up the car according to what I was told. I don't think it is true that it will mess up the engine but anyone mind elaborating...? Afcourse Im going to be doing the usual stuff as well, oil-change, air-filter, and the main part the ROTORS & Brake-Pads. My rotors are damn near warped, car shaking when I brake etc etc, which happens very quickly so I was talking to another guy with an Eclipse and he suggested to go for the slotted rotors for performance. I checked out the prices and found a good set for the front (my car is Front-Wheel drive). I ordered them for about 190 from Pep-Boys and their EBC brand. So do you guys think its worth it to go for performance rotors rather than regular. Me personally I don't mind giving it a try so thats why I went for it. EBC Rotors the first picture.