I asked the same question a bit ago, here's a link to that thread.
Overall, folks did like the following power supplies. I'm likely going to go for the CS7.
Strymon Zuma
Trutone CS7, CS12
Voodoo Labs - Pedal Power 2 Plus, ISO4, 4x4, ISO 5, Pedal Power MONDO
Some folks have also had success...