I've been using AdSense on my site for years. I was contacted by someone at AdKnowdlege telling me they wish to advertise directly on my site instead of going through Google, theoretically earning me more money.
So assume I talk to these guys and they impress me and i decide to go with them.

1. Will I still be able to keep my Google Analytics account?
2. Will I get banned/closed from Google AdWords for doing this?
3. Will my Google search results be pushed down for using another service?

I know that these are probably newbie questions but my site is more of a web app. So I spend most of my time improving my server side code and not much time increasing ... SEO/Internet Marketing...?
Anyways, any help would be appreciated.