At $10k, you can do better than Klipsch or SVS. There are a lot of good choices. Paradigm Premier, Arendal, Monoprice Monolith THX, JBL HDI, Deftech Demand, KEF Reference, Outlaw LCRv2, Revel Performa, to name a few. SVS does deserve consideration for subs, as well as Hsu, Arendal, Outlaw Audio, Paradigm Defiance X15. For receivers, I would just pick whatever Yamaha, Marantz, or Denon that has the feature set that meets your needs. In a 15x15 room, you won't need a ton of power.