Here is the PS I use to power my quad charger (
http://www.hobbypartz.com/75p-t6-multi-charger.html ), It is 25amps. You can't beat it for $39 bucks.
http://www.hobbypartz.com/77p-g350-powersupply.html . I can charge 4 lipos up to 6amps at the same time if I want to.
I use hobbypartz.com for all my lipos, chargers, PS's, lipos bags ect. you get the BEST bag for the buck with them!!! Check them out, you won't be sorry.