Barcelona: La Sagrada Familia - ticket question

I'm trying to book my tickets online for the La Sagrada Familia and I see an option to get an audio tour and entrance or entrance and a tower, but not both. I want an audio tour and a tower viewing.

Also, which tower is better in your opinion?

Check out this thread that is down towards the bottom of this page.

http://boards.cruisecritic.com/showthread.php?t=1998223

I booked the nativity tower and figured I would just ask about an audio guide when I got there.

I'm trying to book my tickets online for the La Sagrada Familia and I see an option to get an audio tour and entrance or entrance and a tower, but not both. I want an audio tour and a tower viewing.

 

Also, which tower is better in your opinion?

I have the same question about purchasing and have not found an answer in any of the threads here. There appears to not be an option for online ticket purchase that includes entrance to Sagrada Familia with tour and tower entrance.