Multi-battery LiPo balance charger recommendations?

So I just placed my IRIS order, along with 3 Multi-Star 5200mAh batteries to go with it. I was looking for a battery charger that could do multiple batteries that was under $75, preferably under $50. Anyone have any recommendations?

I’m still using the 3DR battery and charger. I’d like to get some better batteries, and figured that would be the time to get a better charger too. I’m looking forward to some feedback on comparisons between that battery and the stock battery. Hopefully some chargers will be recommended by others too. You might have better luck in the DIY Drones IRIS section as this isn’t specifically an IRIS technical support questions.