newbiewklipsch

I have a pair of LaScala's and a pair of Hersey II's that I purchased in 1988 and am wondering what would be the best components to go with them. For the subwoofer it may be easier to just say go with the highest price or what you can afford but is the 12" better for my speaker setup over the 15" or is the 10" actually the best fit. Room size is not an issue as they can change. I would like to have a center speaker as well and would like everything to compliment each other and not have one that is really overbearing. Also, I am looking to replace my Denon AVR-1802 but maybe I don't. I would like to read what may go best with my speakers. After all, speaker are the best start.... Thanks, Scott