Once your site is built you’ll be trying to get it in the search engines so save yourself some trouble now and use keywords in your domain choice.
A keyword is a word or short phrase you expect people to be searching for when searching for your products or services.
For example Bob The Builder is a builder based in Nelson New Zealand so we may expect people to search for “builder”, “builder nelson”, “builder nz” or something like that. A good domain from a search engine point of view would therefore be something like bobthebuilder.co.nz or nelsonbuilder.co.nz or bobbuildernelson.co.nz
Having keywords in your domain improves your rank on search engines (which increases traffic) and just makes more sense to your customers.