One thing I've always been kind of torn on is my favorite material for tweeters in car speakers.  Looks like there are a lot of options out there:

• Textile Dome
• Silk Dome
• Aluminum Dome
• Mylar Semi-Dome
• Ceramic

In addition, each manufacturer seems to have a lot of "special" options for tweeter designs that are all their own.

What are the differences in these different designs, and why would you pick one over the other?