If you haven’t given Hexatrack a spin, it’s worth your time to take a good look at what they offer. They have a limited free version and upgrades to paid versions ($97 buy-in+$47/mo.) The major advantage of using HexaTrack is that it can track ppc clicks and keywords right to your landing page. It will also shows competitor activity and will show up click fraud where the same site keeps hitting one of your ads.

You can get more information at HexaTrack.com.

Here’s a video that covers ad tracking.