Shaking steering wheel when stopped?

[BabyBlue2010]

So, I've noticed that when i'm idling at a stoplight, my steering wheel shakes or vibrates. It is slight and has happened since I've had the car I believe. After much research, I've come up with two options.
1.) warped roters
2.) engine mounts
Car has 34,000 miles on it. 2010 model. I don't suspect all these problems!
anyways, Is this a huge concern, would this cause me to break down? cause larger damage later on?
Also, let me add that my brakes are TIGHT. they work great, therefore, causing the confusion.