looking for charger...need advice

[nah51dog]

im looking to put a 3 cell lipo setup into my rc18mt and have no idea what to look for in a charger. i am somewhat familar with the batteries with the only exception being what the "C" measurement is. they talk about 20-30 C in a battery? i would also like the charger to charge my existing nimh batterys if possible. money isnt a problem but i dont want to spend too much. thanks in advance.