No frills = black. A coating similar but a little nicer than truck bed liner. Very good value.
Frills:
http://www.wilsonaudio.com/product/thor/gallery.php
Thor's Hammer from Wilson Audio. Cabinet made from "X Material". It's similar to stuff certain kitchen counters are made from. "Wilson Gloss" paint is probably similar to car paint. Price is probably in the $20,000 range.
http://www.egglestonworks.com/ivy.htm
Reference Ivy made right here in Memphis. The cabinet is covered in black, Italian marble and hand polished. You can read the rest. Price is $50,000 each. $100,000 to listen in stereo. $350,000 for a 7.1 system.
Are these better than the products from Elemental Designs? Yes. That many thousands of dollars better? No. Some of that is customer service. Eggleston will come to your house and set up the speakers. They won't connect them to an old Kenwood receiver from 1986. You will be using a $30,000 record player with a $10,000 stylus and a $20,000 pre-amp connected to $15,000 Krell amps.
Some might even consider SVS and their different wood finishes as extravagent. Some like a little bit of that. My examples are over the top but there is a market for that.
-Robert