I need some help choosing a domain...

Should I go with

dailykeyword.com
or
keyworddaily.com

or

keywordbuzz.com
or
keywordradar.com

example

sciencedaily.com (obviously not mine)

obviously I will not be giving my keyword out haha... I will be developing this site white hat and investing in PPC/media buys.

All suggestions are welcome and appreciated.

What does the traffic here say your domain should be?