I must say I've listened to the c-700 and for $700 it's a damn good unit.
I have two quick suggestions for you:
1)Jog down to a local best buy and purchase a Monster Cable surge supressor, just the cheapy $40 one it will provide some filtering as well protect your investment.
2)If you take a trip to Radio Shack you can also purchase RF chokes, they are little rectangular chunks of ferrite and cost $8 a pair, slap one on either end of the c-700's power cord and you achieve two things cleaner corrent and piece of mind.