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Before you go to a full board, take a look at this one,
http://www.sweetwater.com/store/detail/M8x2
It seems to have all of the hum cancelling features that my pedal board has

You mentioned your home wiring could be an issue. If you are having issues with the units just plugged into the wall, you may be able to reduce the hum using the Furman Strip. I like the Furman...

I would never plug my amp or pedals into a outlet strip. I learned my lesson. I have a Furman pedal board, that includes a conditioned power supply. I have great wiring in the house and plug...