Family Room - approx 20 x 25 (ft) - wood floors. Going with a Denon AVR2807 Receiver. Up front, going to use Paradigm Reference Studio Series - probably cc470 and either Studio 20's or 40's. Questions: (1) would an SVS -PB12 SubWoofer be OK or HSU similar? (2) for the surround sound I need to use "in-ceiling" speakers. Looking for recommendations on the in-ceiling speakers as well. Thanks.