I am curious though, if you will basically be marketing your own websites, then why not add your own custom graphic banners or html-based banners directly to the sections on the page where you want to display them? That would offer full control, and best integration with the design- and layout, and would not affect performance to any degree. What is the point of using 3rd party solutions, unless you want to employ random advertising to unknown 3rd parties websites? I mean, what is the advantage of using adsense if you already know the links and just want to drive traffic to your own websites?
If you just want to extract statistics about clicks and leads, then there must be much better options for doing that than integrating an add-network into your website. To varying degree, visitors don't like ads and don't like to click them either ... I NEVER click them. If you have your own "friendly" banners, they may seem more related and inviting, and won't affect design and performance of your website.