I'm losing my shirt on this one, but I have less need for it now so I can use the bucks for a new 1080p PJ in the HT. I said I would never part with this as it just does everything right but it is overkill for me now.  Address all 10 power quality gremlins.
It gives a constant 120 volts AC output, no matter what.  And in a power outage it will run your system for up to 2 hours.  I have run on battery only for 30 minutes straight as a test one day and it was still going strong.  Basically you are not running off AC but a regenerated AC.
http://www.purepoweraps.com/I am the original owner, have the original double box, etc.  Pristine condition.  VERY heavy, around 60 lbs. due to the batteries inside.
Absolutely will require 3% Paypal fee and shipping to be paid by buyer.
Can be seen here:  
http://alhull.com/room7/2channelnirvana035_jpg.htm