I think the Megatech stuff is truly junk. I wouldn't waste my money on it. For the price of that plane, you could get yourself a good radio.
I assume you want to go electric. I'm not up on electric except to say you need to do some studying. BTW, Watts = Volts X Amps. A friend of mine likes the following plane:
http://www2.towerhobbies.com/cgi-bin...I=LXJKU3**&P=0
Ciao,
Eagle Al