I have the complete Klipsch THX Ultra II system set up in my dedicated theater - including the dual subs and amp. In a word, they are awesome. Truly one of the best speaker systems I've heard - for BOTH movies and music. I listen to a lot of multi channel audio, and this system plays SACD and DVD-Audio better than my previous M&K S-150 system.
For movies, the system simply excels. It literally blows away most home theater systems I've heard - and I've heard many, many nice systems. The speakers aren't "bright" at all, but rather exude power, dynamics, and believe it or not, warmth.
They aren't the most attractive speakers on the market (i.e. black boxes), but Klipsch put all the money in this system where it matters most - the sound. They are still very well built, however. The cabinets are rock solid.
You can't go wrong with this system - it truly is spectacular.