Choosing the right name for your website Domain is much more important than you can imagine,
It should have those criterias : Easy to remember, very easy to spell, easy to tell, short and subject to the web site you own.

Even that your domain name is on  your business card , its not quite sure that your clients are going with your business  card in their pocket.

So what you should focus on when choosing the domain name ?

first , not consider the SEO issue.
second , make your domain name unique
avoid using numbers, its annoying your clients

Choose the .COM domain name and NOT antything else..
It is good idea to register both the short term of the domain name you decided and also the longterm for both ways of misspelling.