and just to give a description of the vibration. i drove it a lot today on the interstate and i feel the vibration the MOST at about 65-75mph. a little slower and it fades. a little faster and it kinda fades. i THINK it is rear wheel bearings because i can hear a quick "whop whop whop" very quietly when i have the radio off. also, there MIGHT be some grindy feeling to it that i picked up here and there. and it accelerates with speed so it's leading me straight to the wheel bearings in the back.
maybe im wrong, but after all ive replaced, checked, and serviced. there isn't much other option. i'm between hubs and rotors at this point.