I decided today that I'm not buying a case. I never use one and when I travel, I have plenty of neoprene pouches I can use. I was going to get one in case someone borrowed my Fire HD 6 and wanted the cover on it, but tough... they can use it bare.
It would be a shame to get the color and then just cover it up.
I've got a lot to learn about using the Fire, so I may ask some stupid questions!
Update: Saved money by not buying a case, spent money on this instead.
http://amzn.com/B009A5204K
Hopefully the headphones will work with the HD 6.