You can't go wrong with acudeftechguy's recommendations, but if you only have room for one sub at $1k, check out the Hsu Research VTF15h, Epik Empire, or Hsu VTF3. The
Hsu Hybrid package would be a good choice too. I think some Klipsch Reference bookshelf speakers would also be worth looking into, but not the Klispch subwoofer. For subs, your best bets are Hsu Research, Outlaw Audio, Elemental Designs, Rythmik, SVS, and Epik. If the speakers don't have to look pretty, you might look into Elemental Designs Cinema series speakers are a package from Chase Home Theater.