For me, after a while of toying with a mix of wall warts, 9v batteries, multiblocs, etc I ended up just saving a bit and plumping for a custom designed one. Since then i've never looked back and I think a stable, secure and safe power supply is as important as a good tuner on a pedalboard (ie very important). Never understood folks who pay a fortune for pedals and then run them without a proper supply.