Get both! If you can pay both get both, that's the best way to be sure. And if you can't get the .com, you need to advertise and add on your pages an "add to favorites" button.But don't forget that, unless it's for a rather large company, websites are found mostly using search engines (google being #1 of them), so do not forget to choose the right keywords... You can study the results on search engines with tools like Internet Business Promoter, it will compare for you the keywords you want to use with what already exists. It can be useful.