I am still in the process of selecting speakers for my living room HT. The room is roughly 18x16 (20' ceiling). The rear of the room is open to the kitchen and breakfast area. I was leaning towards micro sized speakers (Paradigm Cinema, Energy Take 5.2, etc). Now I have talked my wife into possibly allowing a nice pair of bookshelfs or even floorstanding mains.

My question (finally, I know) what should I look for in a surround speaker to match with a larger main (Paradigm Monitor 9 for instance). Becuase my mains are larger, do I need larger surrounds? Is a floorstanding speaker overkill for a HT system used for movies 90% of the time?

Thanks for your help.