Could you tell us what TX batteries and plane batteries you will charge? Especially the plane batts since there's a big difference between radio batts and power batts if the planes are big.

Also you will run the charger(s) on the 12 volt deep cells? If so then you don't need a power supply for them, right?

A first guess is that you may like one of the many 4 channel chargers that are fairly new to market. Most of them are 50 watt x 4 and 5 amp max while being able to do 4 different batt types at a time.