If your name is taken at .com, the co-Domain is a good option. The fitting name at .co promesses more success than a wrong, but available name at .com.
By the way: If you are not citizen of the USA, we recommend to register your name at your country code domain extension. Google lists at the different country versions of Google at the most searches websites with the country code extension at the first page.
And if you your citizen of Columbia, you should register therefore your name at .co, not at .com.
By the way: Nobody forbids you to own two websites with different domains.
You could register the perfect name at .co and the less perfect at .com.
Hans-Peter Oswald
http://www.domainregistry.de/...