Does any one here use POWERVAR power conditioners? I've been searching for a new power conditioner on the web and these seem to keep popping up. They have gotten some pretty good reviews. I'm thinking about ditching my Furman PL-Plus to try one of these out. I would also like to see how a POWERVAR would do at a gig. When I play at a club/bar I sometimes will get a natsy hum or buzz coming out of my rig. My Furman doesn't seem to be doing anything about it. Has anybody ever used it for a live situation?