When I started putting up membership sites, I had 160 'killer' domains. I spent weeks researching available titles and 'scooping' the hot ones.
What I have observed over the past 6 years, is that domains are a dime a dozen and it's really the work you do in SEO and promotion (and delivery of the goods) that makes or breaks your efforts.
I bet you can find an $11 domain which will serve your theme on the money and distinctly.
My
- don't spend too much on the name. Put your resources into what's behind it.
-Dino