Only one problem with the Niagara 7000.... the price. It's not a "7000" for no reason :) Otherwise I would love to own one. Even the Niagara 1000, at $1000 is no bargain.
Personally, I took a much more modest approach to power conditioning, and for me this has worked out very well.
Dedicated (separate breaker) 20 AMP wall outlet >>> Emotiva CMX-2 >>> Panamax MR4300 >>> all equipment
Very happy with results. Essentially no noise floor and ability to draw high amperage. The Emotiva offers a DC filter which is somewhat unique as that functionality is not so easy to come by. The Panamax offers some degree of surge protection, over and under voltage protection, voltage level monitor, switched outlets. Both offer noise/rfi/emi filter. Combine cost of $349 is hard to beat.