For what its worth I think the Sierra towers and center do an amazing job with home theater. Much more dynamic than what I thought they would be. I purchased mine to replace the ascend 340se setup and it was a huge leap forward. Not only do they make music sound incredible, but movies are very lifelike, and they immerse you in the sound. They also sound physically larger then they actually are, I was very impressed with the sound the 5.25" drivers were able to produce.
Before I settled on the Sierras I was on the fence trying to decide between the SVS Ultras, and the Salk Song Towers. I think either of those would be great, but I'm happy I landed on the Ascends. Personally I would steer away from the Tektons based on what I've heard about customer service/fulfillment issues.