2001 Nissan Maxima

I have a 2001 Nissan Maxima (V6 3l) with 83,000 miles. Recently the car shimmys or vibrates when braking at high speeds. My mechanic gave a diagnosis over the phone that the brake rotor's need to be turned, before taking the car in I want to check to see if this is normal, or if anyone else has experienced this. I don't want an unexpected repair.
Is there anything else this could be?

Should I have an alignment or balance done?

Thanks in advance for any help or advice you can offer.
October 3, 2007.

Your mechanic could be right.
The rotors possibly be bad.
80% of the time that is the symptom.
But if the rotors were " cut" before be prepared to replace them.
When you talk " brakes" you talk " safety" " alignment" = Tires wear un-even car goes to right or left not straight etc.

Balance= tires with bumps, car vibrates at certain speed etc.

Good Luck!

Oct 4, 2007.