It is good practice to put company mentioned logos at the bottom of the page, since it is (in a way) a testimonial. In the success area page is a good idea, though I would highly recommend creating a separate page for detailed portfolios of what you've done with the client.
Media mentioned logos should have their own section, below the testimonials section and above the contact section as it's a resource for people to go to for more detailed (and supposedly unbiased) views of your product.
That said, a contact form should always be at the bottom as the CTA. It should have minimal distractions and convey a clear message. I recommend using carousels to display the differnent logos, and using AJAX to display a single quote in big font.