I need some advice about my suspension. I'm driving a 2006 R/T and have 120k miles on it. The tie-rods are shot, so i need to replace. now i'm thinking of upgrades. Perhaps coil-overs. I have a severe vibration in the front wheels at speeds greater than 40mph. i thought it was aftermarket wheels (22") with Nitto 420s tires. However, i continually go to discount tire and have them rotate and balance, yet the vibration is still there. Could this be the brake rotors?