Or you can take a look at BrianG's calculator page. He has a section on chargers that tells what they will charge at on what cells. The eos0606i you linked is an ac/dc charger, the 1210i isn't so you'll need a power supply as well.
Cant go wrong with the hyperion chargers.... Lots of options and good quality equiptment! Just get the one that suites you best and you wont regret it. The duratraxx Ice is another good one with more power but less capabilities then the hyperion although I am not sure if it is ideal for a 6s.