Managing your own Ads using an AdServer

I am planning to sell my own ads and avoid 3rd party service to sell ads and needs to find a good solution to manage this process for me.

I found out 3 options that I can go with.
1) OpenX
2) OIOPublisher
3) Google AdManager

I am not sure which one to go with, If any of you all have used these plz share your thoughts on it. I am planning to use it with Wordpress.

With OpenX, its free and there is a WP plugin thats an advantage

OIOPublisher is not free and has got a WP plugin, people on blogs and forums seems to give it good reviews

Google AdManager - its by google and its free, though many may say you dont want all advertising details to go to google, I already have analytics , adsense and going to join adwords soon so I really dont mind getting AdManager


some of the features I am intrested is , Integraion with WP, how easy is it to use. Option to alert advertisers when ad campain is about to run out ( some automated email system ).Manage CPM ads and provide stats to selected advertisers each month, etc

 

finally decided to go with the hosted OpenX solution without the wordpress plugin