DH Templates

What should MY cover letter LOOK LIKE? I am rebuilding my cover letter now that I have a year's experience in the writing field. I will be applying to a few local magazines and perhaps a few advertising agencies for a junior copywriting position. I know to include samples of my work. With my cover letter, what is the easier one for an employer to read or more preferred format? The basic 3-4 paragraph? Or the 2-3 paragraph that bullets my highlights? Thank you. To help in what I am describing: basic: http://www.technical-resumes.com/examples/cover-systems-administrator.jpg highlight: http://workbloom.com/cover-letter/cover-letter-sample-example-template-image/cover-letter-senior-accounting-professional.gif