to better answer your question, we must ask you what you need/want out of the car. Do you need a back seat? Do you need awd? Are you willing to buy used? Do you want the car to be fast or handle exceptionally well? The only specificiation I can understand from your post is that you want something that lends itself well to car audio (ease of installation, no rattles, etc).
Because if all you are looking for is 4 wheels and some bump, go buy a lightly used taurus for like $5,000 or a brand new hyundai or aveo for $8,000, throw in the tunes, and call it a day.