Forum Moderators: not2easy
What I'd suggest is to put the work out to tender on one of those elance types sites.
Then choose 4-6 writers and give them all the same test project.
See who comes out best for you.
I did this however and wasted about $600. Some were awful, others OK, 1 very good but charged too much.
I therefore worked out it's better to do it myself, yes it takes time but I get 100% what I want.