Running Playlist–Need Suggestions!

When I trained for my first marathon in college, I made a kick-butt playlist that I listened to on all my long runs.  To this day, those songs (plus the taste of strawberry-lime Gatorade) remind me of the early morning in Harrisonburg, VA.  I don’t typically listen to music while I run, but there’s no question that it helps me stay motivated and keep pace during a run.  

As we move toward cooler weather, I am tentatively planning to run another marathon in December (“tentatively” because I haven’t signed up yet, but I am putting in the runs.)  The time has come for another kick-butt playlist to get me through those 18 and 20-milers.  I want a fresh batch of songs that will pump me up and years later remind of this time in my life.  

I need your suggestions:  What are some great songs for my running playlist that are:

     a. clean
     b. relatively current
     c. make no mention of “bein’ in da club”?  

I’m open to any genre.

Thanks!!