monster avs2000 or richards gray 1200

this i know its a variac but according to the review in stereophile it really bettered the mids and relieved the stress from the components .it is said that its better on the front end.but still the question is unanswered.did anyone compare any of these devices to say which is the best for the front end and for the amplification at the best price.tnkx pat

and what about the powervar 1200 did compare it to other devices.tnkx pat

and for the powervar 1200 did anyone hear it or compare it to any other device.tnkx.pat