prepositions - Does this sentence call for an additional "for"?

I'm confronted with two compelling options:

1. 
   

   I want to be at least partially responsible for getting them to think differently, or inspiring them to earnestly investigate new topics.

   
   




2. 
   

   I want to be at least partially responsible for getting them to think differently, or for inspiring them to earnestly investigate new topics.

   
   

Which one should I choose, and why? The first sentence uses fewer words, usually my yardstick for choice in situations like this. But the second sounds better when spoken, so I'm torn.