On that link you gave it states that you will need the EQ+6 balancing package to be able to balance the cells with that charger. There are other very slightly cheaper ways to use things like the Astro blinky, but to be honest their system looks pretty reasonable.

http://www.ripmax.com/item.asp?itemid=O ... gory=O0168

Theres the link for it. It will plug into the charger and your batteries and most likely balance during charging and wil display the voltage of each cell on the charger screen.