I think its a domain name that needs to be developed to increase past reg fee in value.
"Top40" has a lot of search engine generated traffic potential.
41,342 overture searches for top40 last month! I think that's considerable.
BTW, this is my biased opinion, I own top40.ws, and highest offer received so far is only $50! So I intend to develop it...
films.top40.ws
music.top40.ws
books.top40.ws
etc
I like the name! Good luck to you!