Vibration

I bought my cx5 last year, it was rental for 36 months. When I acquired it 35 k miles I have put 15 on it in about 18 months. Recently I got a decent vibration at about 60 mph or plus and it kinda faded at high speeds. I'm having local tire place do a rotation, balance and allignment. I have noticed that one rotor has a small looking crack possible. What else should I look to do in diagnose. Im an apartment dweller so garage time is kinda rare. Thank you.
 

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