I've had my current 5.1 home theater system since 2005. A few months ago I upgraded my receiver, a Yamaha RX-A1070 and now I'm considering an upgrade of my subwoofer, a Klipsch RW-12. My other speakers are Klipsch as well ,fronts RF-35, center RC-35 and surrounds RS-35. The RW-12 sounds ok but would an upgrade give me that much better performance. My budget is $1000. I understand this is a subjective question but any help/opinions would be appreciated.