Do you know what model of APC? I think a few on this forum, possibly XenonMan, has a few APC's that are 1.5KW. Not sure if it would help with the hissing sound you describe though, but it might, doesn't seem like a bad price.
_________________________
Axiom M80v2-VP180v3-QS8v2-EP600v2-EP350v3 Denon3808 Outlaw7700
Axiom M22v2-OWM22v3-VP100v3-EP350v3 Denon2805
Sanyo Z2 Projector
130" DIY Screen
Panny BluRay
My Homepage