I find the keyword in the domain does help, but it really isn't worth chasing to the point of having a stupid name.. What you really want is an "exact phrase match"

I.e. "On sale laptops" gets searched for 19.9k times a month https://adwords.google.com/select/KeywordToolExternal

and position 1 is likely to get nearly 40% (if not more) of those clicks http://www.jaygeiger.com/index.php/2008/11/05/percentage-cli...

Thus if you can own OnSaleLaptops.com you stand to get around 10-30k hits/mo surely you can monetize that :/

hope these answers were ok, they are just my experience.