There are a few good chargers. Getting one with an integrated balancer is gonna cost you though. The Hyperion 1210I/LBA10 combo is nice for the price and the charger and balancer work in conjunction with each other. The upside to this is that the balancer can control the charge rate, if needed, to help balance the pack which speeds the balancing process.

The duratrax ice is a good charger too. It will also work with the LBA10 balancer, but won't interface with it. I like it because it's easy to use, is inexpensive, and pretty tough. The only downside is that it takes longer to charge a battery pack than some other chargers.

I'm now using a Thunderpower 1010C with a Thunderpower balancer and I like it. It's FAST and the two components interface with each other like the Hyperion setup does; but does not allow networking of two balancers as does the Hyperion. On the other hand, the software is upgradeable via usb link, so the charger will never go out of "style."

I've had all three of these and they all work well.

Another popular charger is the Superbrain 989. Check around for pricing.