As part of a home theatre system, I have been looking into purchasing a line conditioner. To be honest, I have no idea what to look for. It isn't that difficult to compare products such as speakers and amps. You can easily find the specs and even most novices know what to look for when comparing and contrasting. However,I dont find that to be the case for line conditioners. I know all line conditioners generally offer surge protection and you can read the joule rating. I know they have voltage regulators. What I dont know is how to compare model X to model Y. What makes one better than the other aside from product reputation? Any help would be appreciated. Thanks.