I'd consider looking at the Corally Eclips range of duo and quad chargers.
Link
HERE
I have the duo 2100 and have found it a great addition for my requirements, but won't charge the current you are after so 2400 or 4400
One feature you may find useful if your charging a range of different batteries is that you have a battery memory setting where you can set your defaults for the various type of batteries you want to charge up.
They can also be used off of 12dc or 110/240V which is helpful for home and field charging.
Corally also do a nice range of different charging leads so you can avoid having to use a balance board.