I use my Burkey Flatliner Pro to power both my Factors and the remaining ten pedals -including a Whammy and MIDI gear from Access – and get no added noise at all.
Each Factor uses three of the 9 VDC outlets in parallel for a current of 600 mA (they don't draw more than this) – and there's still enough outlets and current left to power the other stuff on the board.
I know the Flatliner isn't that easily found stateside, and it's a brick – but seriously, it takes up a lot less real estate than 2+ wall warts + a PP2+, etc., etc.
