Re: New System New Problem
It really depends on the source of the buzz. If it is internal to the TV then the power conditioner probably won't. If it is a ground loop issue with your electrical system, possibly.
I assume from your equipment you are using analog outputs from your TV, if so:
To troubleshoot I would use a battery operated amp like a auto amp or headphone amp and see if the buzz was still present and if it is then the buzz is probably being induced internally in the TV. Use of an external ATSC tuner could then be an answer.
If you are using an optical or digital coax sound output:
The buzz would almost certainly be introduced by your TV. Again an external ATSC tuner may be the solution.
An ATSC tuner would probably be cheaper than the power conditioner as well.