I've messed with :
LRP AC/DC charger
Powerlabs PL6
Hyperion duo
and finally settled on an iCharger duo

Depending on how serious you are about getting back in to the hobby, I would shoot straight for an iCharger 308 or 406 duo otherwise get a server power supply, and 2 of those ISDT chargers. If you're running on-road, you'll be wanting to run tire warmers soon and they don't do AC tire warmers so just go DC.
Also if you ever go to a track or somewhere where there's no power outlets, you can run off a 12V car battery no probs.