I have a thunderpower 610C and while I like it only does 80W. If i did it over again (and might soon), i'd get the Turnigy Reaktor which can charge up to 300W / 20A and is only $65:
http://www.hobbyking.com/hobbyking/s...dProduct=71592

A lot of good info on this thread here:
http://www.rcgroups.com/forums/showt...115921&page=15