Hey Zach,
Good to see you on here. I was the guy on AVS that recommended you check out Aperion in the first place.
I haven't gotten mine yet, so I can't say for sure, but I asked the exact same question you did. The audio gurus suggested that while the towers will help, they have the greatest benefit for those that listen to a lot of music on their system.
For guys like you and I, who spend the majority of the time on TV/Movies, the bookshelf/sub combo suits everything greatly.
I'll let the gurus chime in further, but depending on the size of your room, a 6B/6C/Sub setup should be great in all but the largest of rooms.