Once again if I were to choose, I'd choose the Thunder Power TP1010C. Again this isn't your average, cheap Lipo charger, but rather a top-of-the-line one. Street cost of this charger is $199.99 but you can find some that are cheaper if you look around. This charger charges Lipos from 2 -10 cells and has an auto shut-off feature to prevent over charging and damaging your lipo. Why would I recommend such a thing, because sooner of later when you upgrade yourself to a more bigger heli like a size 30 or 50 electric, you will not have to spend on another charger anymore. If you buy a cheap or reasonably priced Lipo charger which can only handle 3-4 cells now, and then later decided on getting a TREX600 or Raptor e550 that requires 5- 10 cell lipo, you'd end up buying another charger to accomodate those batteries which will make you spend more. Now you'll end up with having two chargers spending twice instead of just one. You can also buy the TP 210 balancer later on (not now) to help balance your lipo and prolong its life cycle.

Planning ahead of time will save you more later on. That's what I'd say.