Hello,
I totally understand the fact that you've received a number of bids and must have a hard time deciding who to award this contract to. I would too.
I strongly believe I could pull this off in ways that would absolutely satisfy you. I've been writing for a couple years and have gained some valuable experiences along the way.
Interesting thing about me is I'm am very open to suggestions and follow them to the core. Also, I don't operate in the dark, so you can reach me if you've got additional instructions and whatnot.
I've got samples of articles I've written, all of them recent. I would be willing to share them if you would like to take a look at them.
I intended to keep this proposal short as much as possible. So, if you think you've got your guy, I'm happy to start work.