BTW, the Thunderpower also has an update out that allows charging A123s. If you have the cable, all you have to do is download it. I too, was seriously considering the Hyperion setup. I went with the Thunderpower because my LHS had in on the shelf and he made me a good deal.
I would like to get the charger and lipos from the same place to save on some shipping. I'm having a hardtime finding Trakpower 4900 lipos in the US, and the place that I did find them only sells the charger I listed above. KNow of anymore places in the US for Trakpower batteries?