The reason I suggested checking the rotor for runout is to determine whether the face of the rotor where the wheel mounts is true, and whether the center hole is concentric. At this point, checking the rotor's braking surface is not critical. A third problem that I have seen is the inner bearing race not fully/squarely seated, so when the rotor and bearings are mounted on the spindle and tightened, the bearings push and pull as they rotate. One test for this is to have the wheel bearing nut just shy of contact, then spin the wheel while tightening the nut a degree at a time. If you feel the nut feeling snug and loose while turning it, check the bearings and races.
To check tire roundness, jack up the control arm so that the tire is just skimming the floor. Spin and watch the clearance below the tire.
