So I was talking to Dina yesterday about doing the EX upgrade on my S2s and decided to just go ahead and order the EX. So I'm replacing my S2 LCR with 2EX LR and Duo Center. Still wondering if I should have just gone for the Horizon because the shelves in my entertainment center are adjustable so I could make room for 11 inches but I just don't know how big the difference would be when using a sub-woofer. Also thought about the towers but my TV is 41 inches from the floor and towers are 43 inches so i would have to move the TV up which i really dont want to do. Anyway looking forward to trying out the new speakers. Ive had the S2s for a little over 3 years and they are still the best speakers Ive ever heard.