You won't find anything better than this combo for the price.
Charger:
Thunder AC6 Smart Charger
Battery:
Sky Lipo 5000mAh 2S
I actually prefer the hard case lipo a little more but they are out of stock on it. I have a few soft case Sky Lipos and have never had any issues out of them. Just a preference thing.
Also the battery wont fit directly into your battery tray. I just used ties on mine and its fine. You could mod the battery tray a little if you wanted it to fit perfectly though.
Now onto other important things you should know. I upgraded mine to lipo and **** started breaking. But you'll have that with way way more power. So be prepared to budget in some replacement parts.