I am looking at something like this:

http://www.lightwavesconcept.com/product.php?productid=17002&cat=289&page=1

I have very similar tracks in mine and get no rattles.

Ditto here...I have two tracks of lights and a pretty powerful SW and no rattles.

No rattles here.

Bought my track and lights at Lowes.

ND

whew sounds good. thx!

I have a number of track lights in my ceiling, and my 18" Velodyne shakes the structure pretty hard. In doing some testing with the Stryke test CD, noticed at certain frequencies one place in the track vibrated against the ceiling and was objectionable. Since everything is white, I fold up a piece of paper and wedged it between the track and the ceiling at the rattle point. Stopped it cold.

Moral of the story is that it's possible for the track to vibrate against where it's fastened, but it should be fixable in almost any situation.