I bought 2 chargers from China. They do lead acid, lipos, nmh, nicad.... up to 5S lipos with built in balance ports and came with a bunch of charge adapters and 2 power supplies for under 200 shipped to my door. 5 amp charge. they are small and work great.
http://www.r2hobbies.com/
I got the imax B5 but they have them up to 8S