I have a Diago Powerstation. Small formfactor, quiet, 3000ma and can be used to power up to 30 pedals. Standard 9v centre negative daisychain comes in the box but Diago have plenty of adapters (12v/18v/centre positive & 9v battery clip) to suit whatever power needs your pedals may have.
Plenty of stockists worldwide and their customer services are second-to-none. Highly recommended.
Have posted a link to the website so have a look: http://www.diago.co.uk/pedal-power/d...erstation.html