here
2s 6500 35/65c only $83
http://www.allerc.com/product_info.p...oducts_id=4707
and for a charger you cant beat a new 720 itll easily charge both of those 6500 2s together as a 4s at 10amps if you wanted to
http://www.rc-monster.com/proddetail...S720IV3&cat=19
mike also sells a nice PS for $50 that will handle the 720 perfectly
http://www.rc-monster.com/proddetail...rya20ps&cat=19
so for less than $370 you can have the best quality batteries and charger setup that you can get and these will hold their value (mostly speaking of the charger)