I use the Hyperion Duo series, the newest one is the 615, I have a 610 duo and will be upgrading to the duo 615 in a few weeks. It can do every chemistry up to 6 cell lipo and it can gang charge and balance 2 packs at the same time or charge two packs independently at 15 amps on each side. Computer interface for bidirectional communication and control w/ your computer (software out in December for complete control, monitoring software out now) and 20 profiles per channel. It's firmware is upgradeable and they add features and fix bugs regularly. Kind of hard to beat it