Here is the 4 channel 100w per channel unit that is a step above the 50w units.
http://www.hobbyking.com/hobbyking/s...y_Charger.html
I have one of the 50w 4ch like the HiTec, & a few of the buttons failed after a season requiring some modding with new buttons.
50watt chargers are worth about $30 each, not much more.
my 0.02