Narrow your search by using the filters on the right. You can filter by included dances, number of tracks, release date, vocal vs.instrumental, and price. You can also see the different number of CDs available.
Don't just save your CDs for practice. Listening to a strict tempo while doing other activities like driving or household chores, can help you become more familiar with the timing. Not only will you be able to recognize the cha cha from the samba at the next dance, but you'll find your next dance class just that much easier.