Building a house and am going to add an a surround sound system. Enjoy listening to 2 channel music for the most part, not movies but watch them on occasion. Which speakers would you recommend - the Klipsch RF 83 (like the RF 7) with their top sub or the Def. Tech. 7000s? Any others that I should consider in the $4000-$6000 range? Again, I prefer two channel music, but will have surround sound as well....any thoughts?