Well to help you with the switch when your ready.........Listed below are two websites. One for the lipo's and charger and the other for a small power supply for the charger.
Lipos: $14.51
http://hobbycity.com/hobbyking/store...idproduct=9172
Charger: $32.79
http://hobbycity.com/hobbyking/store...dProduct=10707
Power Supply: $34.95
http://www.bphobbies.com/view.asp?id...5&pid=B3615199
With 2 lipos, charger and power supply I think you'll spend about $140 including shipping.
The US warehouse has the lipos but not the charger. So your first order will have to be from Hong Kong where you'll pay the $32 for there EMS shipping. But all other battery purchases can be made from there US warehouse. The same lipos here are $17.33 and shipping for 2 is only $8.90.
US warehouse Lipo's:
http://hobbycity.com/hobbyking/store...dproduct=16206