Get a $70 turnigy reaktor charger from hobbyking and a small power supply of ebay. Around $100 total, will charge at high balanced amperage. They work great for the money, and if/when you decide to upgrade you will already have a power supply.

http://www.ebay.com/itm/iCharger-12v-75amp-900-watts-R-C-Power-Supply-for-PL-6-8-iCharger-4010-308-/171739261664

http://www.hobbyking.com/mobile/viewproduct.asp?idproduct=44112

This is the best you'll get at this price range. I have a 30 amp reaktor charger and this same power supply. Software balancing algorithm works great. Make sure when ordering from hobbyking select the regional US warehouse so it ships to you from a domestic location