strange noise from left side wheels

[Jape]

I recently replaced my brake pads and rotors on my 2009 versa after 50k miles. Im not 100% sure if it started after the replacement or it was occuring before but when I drive at low speeds i can hear a faint clicking noise from the left hand side. I believe (its hard to tell while youre moving) it is comin from the front tire. It sounds as though there is a loose sticker flapping as the wheel goes around, that is how faint the sound is. Any advice would be greatly appreciated.

[riaazfr1]

Possibly a bolt may be a little loose? double check all bolts. could me the brake shims, or the clips that help hold it within the caliper bracket?

[Jape]

I am leaning towards the possibility of a worn bearing. The sound is similar to that of balls inside of bearings clicking together. Obviously I hope this is not the case as im sure the cost and maintenance will not be fun. But if this is the case, has anyone had this issue or replaced a bearing in their versas? Know the approximate cost?

[Jape]

A friend and I took a look at the wheel bearings on both of the front tires about two weeks ago and there were no signs of failure or even a slight wobble. Checked the breaks and the axle boots and everything checked out okay. Now the faint noise is more of a loud click and still occurs at the same speed as the wheels. Does anyone have any input on what this could be or where I should check? I would like to narrow it down a little before removing axles just to hope to find the cause. Any advice would be greatly appreciated.
A little back ground: The car is at about 52k miles, the click does not seem to get worse when turning, and there is no direct signs of part failure (i.e. no shake in the steering wheel or brake pedal and no grinding noises). And all of my accessible bolts are tightened to specified torques.