Knowing where you're coming from, the iCharger 208B would be the better choice imho. The Duo is a nice charger, but its expensive.

You can get the cabling you need and it has plenty of power to do the job. Just make sure you get a 350watt power supply so you're not limiting what the charger can do.

this is where I bought my 3010b iCharger - he has it all and is mor ethan glad to help if needed -

http://www.progressiverc.com/index.p..._id=1&Itemid=1