Not quite sure what can be done with thickness.org, cannot think of any way to monetize it or even make it appealing so will ignore that one but I think WeddingTiaras.org is quite interesting, there is a huge market for this kind of thing and even if you move away from the tiaras angle eventually it will work because it is easy to remember.
.com of course would be far better but I think Kevin Ham probably already has it, he likes his wedding domains :p
Maybe low $xxx-mid $xxx enduser?