You should think about what you are trying to accomplish with a dual output charger. They are a bit nicer to deal with while on your bench (less wires, etc) but something like the Hyperion 720i is big. Takes up a lot of space in your pit bag. The Junsi 306b 1000w charges are twice as powerful as the Hyperion 720i, even at 12v, while taking up about half the space in the pit bag. Two Junsi chargers are pretty close to what the Hyperion 720i cost.
Dual output chargers also have the down side of a single input pad for both channels, and in the case of the TP a single LCD.
BTW, as others have suggested, build your own PS out of server units. Way cheaper than any RC labeled PSU.