The Nosram Stealth Evo will charge both NiMh and LiPo cells if you ever want to use them. It's a 12v charger so if you want to use it at home you will need either the 10 or 14a Nosram power supply.
For club racing with NiMh's you will probably need 3 packs if you don't want to abuse them too much. With a LiPo pack you will only need 1 pack and be able to keep topping it up
